diff --git a/idea/idea-completion/testData/basic/multifile/CallableReferenceNotImported/CallableReferenceNotImported.kt b/idea/idea-completion/testData/basic/multifile/CallableReferenceNotImported/CallableReferenceNotImported.kt
index 9853a70378f..840a9c66214 100644
--- a/idea/idea-completion/testData/basic/multifile/CallableReferenceNotImported/CallableReferenceNotImported.kt
+++ b/idea/idea-completion/testData/basic/multifile/CallableReferenceNotImported/CallableReferenceNotImported.kt
@@ -5,4 +5,3 @@ fun String.foo() {
 
 // EXIST: xxx_topLevelFun
 // EXIST: xxx_topLevelVal
-// ABSENT: xxx_extFun
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/KotlinFirCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/KotlinFirCompletionContributor.kt
index aae504d11fb..f888e521f2b 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/KotlinFirCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/KotlinFirCompletionContributor.kt
@@ -76,83 +76,70 @@ private object KotlinFirCompletionProvider : CompletionProvider<CompletionParame
         basicContext: FirBasicCompletionContext,
         positionContext: FirRawPositionCompletionContext,
     ) {
-        val keywordContributor = FirKeywordCompletionContributor(basicContext)
-        val classReferenceContributor = FirClassReferenceCompletionContributor(basicContext)
-        val callableContributor = FirCallableCompletionContributor(basicContext)
-        val infixCallableContributor = FirInfixCallableCompletionContributor(basicContext)
-        val callableReferenceContributor = FirCallableReferenceCompletionContributor(basicContext)
-        val classifierContributor = FirClassifierCompletionContributor(basicContext)
-        val classifierReferenceContributor = FirClassifierReferenceCompletionContributor(basicContext)
-        val annotationsContributor = FirAnnotationCompletionContributor(basicContext)
-        val packageCompletionContributor = FirPackageCompletionContributor(basicContext)
-        val importDirectivePackageMembersCompletionContributor = FirImportDirectivePackageMembersCompletionContributor(basicContext)
-        val typeParameterConstraintNameInWhereClauseContributor =
-            FirTypeParameterConstraintNameInWhereClauseCompletionContributor(basicContext)
-        val classifierNameContributor = FirSameAsFileClassifierNameCompletionContributor(basicContext)
-        val whenWithSubjecConditionContributor = FirWhenWithSubjectConditionContributor(basicContext)
+        val factory = FirCompletionContributorFactory(basicContext)
 
         when (positionContext) {
             is FirExpressionNameReferencePositionContext -> {
-                complete(keywordContributor, positionContext)
-                complete(packageCompletionContributor, positionContext)
-                complete(callableContributor, positionContext)
-                complete(classifierContributor, positionContext)
+                complete(factory.keywordContributor(1), positionContext)
+                complete(factory.callableContributor(1), positionContext)
+                complete(factory.classifierContributor(1), positionContext)
+                complete(factory.packageCompletionContributor(2), positionContext)
             }
 
             is FirTypeNameReferencePositionContext -> {
-                complete(keywordContributor, positionContext)
-                complete(packageCompletionContributor, positionContext)
-                complete(classifierContributor, positionContext)
+                complete(factory.classifierContributor(0), positionContext)
+                complete(factory.keywordContributor(1), positionContext)
+                complete(factory.packageCompletionContributor(2), positionContext)
             }
 
             is FirAnnotationTypeNameReferencePositionContext -> {
-                complete(keywordContributor, positionContext)
-                complete(packageCompletionContributor, positionContext)
-                complete(annotationsContributor, positionContext)
+                complete(factory.annotationsContributor(0), positionContext)
+                complete(factory.keywordContributor(1), positionContext)
+                complete(factory.packageCompletionContributor(2), positionContext)
             }
 
             is FirSuperTypeCallNameReferencePositionContext -> {
-                complete(FirSuperEntryContributor(basicContext), positionContext)
+                complete(factory.superEntryContributor(0), positionContext)
             }
 
             is FirImportDirectivePositionContext -> {
-                complete(packageCompletionContributor, positionContext)
-                complete(importDirectivePackageMembersCompletionContributor, positionContext)
+                complete(factory.packageCompletionContributor(0), positionContext)
+                complete(factory.importDirectivePackageMembersContributor(0), positionContext)
             }
 
             is FirPackageDirectivePositionContext -> {
-                complete(packageCompletionContributor, positionContext)
+                complete(factory.packageCompletionContributor(0), positionContext)
             }
 
             is FirTypeConstraintNameInWhereClausePositionContext -> {
-                complete(typeParameterConstraintNameInWhereClauseContributor, positionContext)
+                complete(factory.typeParameterConstraintNameInWhereClauseContributor(0), positionContext)
             }
 
             is FirUnknownPositionContext -> {
-                complete(keywordContributor, positionContext)
+                complete(factory.keywordContributor(0), positionContext)
             }
 
             is FirClassifierNamePositionContext -> {
-                complete(classifierNameContributor, positionContext)
+                complete(factory.classifierNameContributor(0), positionContext)
             }
 
             is FirWithSubjectEntryPositionContext -> {
-                complete(whenWithSubjecConditionContributor, positionContext)
+                complete(factory.whenWithSubjectConditionContributor(0), positionContext)
             }
 
             is FirCallableReferencePositionContext -> {
-                complete(classReferenceContributor, positionContext)
-                complete(callableReferenceContributor, positionContext)
-                complete(classifierReferenceContributor, positionContext)
+                complete(factory.classReferenceContributor(0), positionContext)
+                complete(factory.callableReferenceContributor(1), positionContext)
+                complete(factory.classifierReferenceContributor(1), positionContext)
             }
 
             is FirInfixCallPositionContext -> {
-                complete(keywordContributor, positionContext)
-                complete(infixCallableContributor, positionContext)
+                complete(factory.keywordContributor(0), positionContext)
+                complete(factory.infixCallableContributor(0), positionContext)
             }
 
             is FirIncorrectPositionContext -> {
-                // do nothing, completion is not suposed to be called here
+                // do nothing, completion is not supposed to be called here
             }
         }
     }
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/LookupElementSink.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/LookupElementSink.kt
index 119c8c9675c..67d1e013478 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/LookupElementSink.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/LookupElementSink.kt
@@ -13,6 +13,7 @@ import com.intellij.codeInsight.lookup.LookupElementDecorator
 import com.intellij.openapi.editor.Document
 import com.intellij.psi.util.elementType
 import org.jetbrains.kotlin.idea.completion.stringTemplates.InsertStringTemplateBracesLookupElementDecorator
+import org.jetbrains.kotlin.idea.completion.weighers.CompletionContributorGroupWeigher.groupPriority
 import org.jetbrains.kotlin.idea.core.canDropBraces
 import org.jetbrains.kotlin.idea.core.dropBraces
 import org.jetbrains.kotlin.lexer.KtTokens
@@ -24,13 +25,21 @@ import org.jetbrains.kotlin.psi.KtStringTemplateEntryWithExpression
 internal class LookupElementSink(
     private val resultSet: CompletionResultSet,
     private val parameters: KotlinFirCompletionParameters,
+    private val groupPriority: Int = 0,
 ) {
 
+    fun withPriority(priority: Int): LookupElementSink =
+        LookupElementSink(resultSet, parameters, priority)
+
     fun addElement(element: LookupElement) {
+        element.groupPriority = groupPriority
         resultSet.addElement(applyWrappersToLookupElement(element))
     }
 
     fun addAllElements(elements: Iterable<LookupElement>) {
+        elements.forEach {
+            it.groupPriority = groupPriority
+        }
         resultSet.addAllElements(elements.map(::applyWrappersToLookupElement))
     }
 
@@ -40,6 +49,7 @@ internal class LookupElementSink(
     }
 }
 
+
 private object WrappersProvider {
     fun getWrapperForLookupElement(parameters: KotlinFirCompletionParameters): List<LookupElementWrapper> {
         return when (parameters.type) {
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCallableCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCallableCompletionContributor.kt
index 66802843f5f..0ebcb9f7d99 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCallableCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCallableCompletionContributor.kt
@@ -28,7 +28,8 @@ import org.jetbrains.kotlin.idea.completion.lookups.detectImportStrategy
 
 internal open class FirCallableCompletionContributor(
     basicContext: FirBasicCompletionContext,
-) : FirContextCompletionContributorBase<FirNameReferencePositionContext>(basicContext) {
+    priority: Int,
+) : FirCompletionContributorBase<FirNameReferencePositionContext>(basicContext, priority) {
     private val typeNamesProvider = TypeNamesProvider(indexHelper)
 
     protected open fun KtAnalysisSession.getInsertionStrategy(symbol: KtCallableSymbol): CallableInsertionStrategy = when (symbol) {
@@ -216,8 +217,9 @@ internal open class FirCallableCompletionContributor(
 }
 
 internal class FirCallableReferenceCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCallableCompletionContributor(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCallableCompletionContributor(basicContext, priority) {
 
     override fun KtAnalysisSession.getInsertionStrategy(symbol: KtCallableSymbol): CallableInsertionStrategy =
         CallableInsertionStrategy.AsIdentifier
@@ -257,8 +259,9 @@ internal class FirCallableReferenceCompletionContributor(
 }
 
 internal class FirInfixCallableCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCallableCompletionContributor(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCallableCompletionContributor(basicContext, priority) {
     override fun KtAnalysisSession.getInsertionStrategy(symbol: KtCallableSymbol): CallableInsertionStrategy =
         insertionStrategy
 
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassReferenceCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassReferenceCompletionContributor.kt
index fd295d8dbea..e98e002fa19 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassReferenceCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassReferenceCompletionContributor.kt
@@ -12,8 +12,9 @@ import org.jetbrains.kotlin.idea.frontend.api.KtAnalysisSession
 import org.jetbrains.kotlin.platform.jvm.isJvm
 
 internal class FirClassReferenceCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCompletionContributorBase<FirCallableReferencePositionContext>(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCompletionContributorBase<FirCallableReferencePositionContext>(basicContext, priority) {
     override fun KtAnalysisSession.complete(positionContext: FirCallableReferencePositionContext) {
         if (positionContext.explicitReceiver == null) return
         sink.addElement(createKeywordElement("class"))
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassifierCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassifierCompletionContributor.kt
index bacccc045f0..f4be493585e 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassifierCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirClassifierCompletionContributor.kt
@@ -20,7 +20,8 @@ import org.jetbrains.kotlin.idea.frontend.api.types.KtNonErrorClassType
 
 internal open class FirClassifierCompletionContributor(
     basicContext: FirBasicCompletionContext,
-) : FirContextCompletionContributorBase<FirNameReferencePositionContext>(basicContext) {
+    priority: Int,
+) : FirCompletionContributorBase<FirNameReferencePositionContext>(basicContext, priority) {
 
     protected open fun KtAnalysisSession.filterClassifiers(classifierSymbol: KtClassifierSymbol): Boolean = true
 
@@ -72,8 +73,9 @@ internal open class FirClassifierCompletionContributor(
 }
 
 internal class FirAnnotationCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirClassifierCompletionContributor(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirClassifierCompletionContributor(basicContext, priority) {
 
     override fun KtAnalysisSession.filterClassifiers(classifierSymbol: KtClassifierSymbol): Boolean = when (classifierSymbol) {
         is KtAnonymousObjectSymbol -> false
@@ -97,8 +99,9 @@ internal class FirAnnotationCompletionContributor(
 }
 
 internal class FirClassifierReferenceCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirClassifierCompletionContributor(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirClassifierCompletionContributor(basicContext, priority) {
 
     override fun KtAnalysisSession.getImportingStrategy(classifierSymbol: KtClassifierSymbol): ImportStrategy =
         ImportStrategy.DoNothing
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorBase.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorBase.kt
index bcde5c5dde5..2dfa15b0d7a 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorBase.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorBase.kt
@@ -30,10 +30,25 @@ import org.jetbrains.kotlin.psi.KtDotQualifiedExpression
 import org.jetbrains.kotlin.psi.KtExpression
 import org.jetbrains.kotlin.psi.KtFile
 
-internal abstract class FirCompletionContributorBase<C : FirRawPositionCompletionContext>(protected val basicContext: FirBasicCompletionContext) {
+internal class FirCompletionContributorOptions(
+    val priority: Int = 0
+) {
+    companion object {
+        val DEFAULT = FirCompletionContributorOptions()
+    }
+}
+
+internal abstract class FirCompletionContributorBase<C : FirRawPositionCompletionContext>(
+    protected val basicContext: FirBasicCompletionContext,
+    options: FirCompletionContributorOptions,
+) {
+
+    constructor(basicContext: FirBasicCompletionContext, priority: Int) :
+            this(basicContext, FirCompletionContributorOptions(priority))
+
     protected val prefixMatcher: PrefixMatcher get() = basicContext.prefixMatcher
     protected val parameters: CompletionParameters get() = basicContext.parameters
-    protected val sink: LookupElementSink get() = basicContext.sink
+    protected val sink: LookupElementSink = basicContext.sink.withPriority(options.priority)
     protected val originalKtFile: KtFile get() = basicContext.originalKtFile
     protected val fakeKtFile: KtFile get() = basicContext.fakeKtFile
     protected val project: Project get() = basicContext.project
@@ -42,6 +57,7 @@ internal abstract class FirCompletionContributorBase<C : FirRawPositionCompletio
     protected val lookupElementFactory: KotlinFirLookupElementFactory get() = basicContext.lookupElementFactory
     protected val visibleScope = basicContext.visibleScope
 
+
     protected val scopeNameFilter: KtScopeNameFilter =
         { name -> !name.isSpecial && prefixMatcher.prefixMatches(name.identifier) }
 
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorFactory.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorFactory.kt
new file mode 100644
index 00000000000..7af2aeec6cb
--- /dev/null
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirCompletionContributorFactory.kt
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.completion.contributors
+
+import org.jetbrains.kotlin.idea.completion.context.FirBasicCompletionContext
+
+internal class FirCompletionContributorFactory(private val basicContext: FirBasicCompletionContext) {
+    fun keywordContributor(priority: Int = 0) =
+        FirKeywordCompletionContributor(basicContext, priority)
+
+    fun classReferenceContributor(priority: Int = 0) =
+        FirClassReferenceCompletionContributor(basicContext, priority)
+
+    fun callableContributor(priority: Int = 0) =
+        FirCallableCompletionContributor(basicContext, priority)
+
+    fun infixCallableContributor(priority: Int = 0) =
+        FirInfixCallableCompletionContributor(basicContext, priority)
+
+    fun callableReferenceContributor(priority: Int = 0) =
+        FirCallableReferenceCompletionContributor(basicContext, priority)
+
+    fun classifierContributor(priority: Int = 0) =
+        FirClassifierCompletionContributor(basicContext, priority)
+
+    fun classifierReferenceContributor(priority: Int = 0) =
+        FirClassifierReferenceCompletionContributor(basicContext, priority)
+
+    fun annotationsContributor(priority: Int = 0) =
+        FirAnnotationCompletionContributor(basicContext, priority)
+
+    fun packageCompletionContributor(priority: Int = 0) =
+        FirPackageCompletionContributor(basicContext, priority)
+
+    fun importDirectivePackageMembersContributor(priority: Int = 0) =
+        FirImportDirectivePackageMembersCompletionContributor(basicContext, priority)
+
+    fun typeParameterConstraintNameInWhereClauseContributor(priority: Int = 0) =
+        FirTypeParameterConstraintNameInWhereClauseCompletionContributor(basicContext, priority)
+
+    fun classifierNameContributor(priority: Int = 0) =
+        FirSameAsFileClassifierNameCompletionContributor(basicContext, priority)
+
+    fun whenWithSubjectConditionContributor(priority: Int = 0) =
+        FirWhenWithSubjectConditionContributor(basicContext, priority)
+
+    fun superEntryContributor(priority: Int) =
+        FirSuperEntryContributor(basicContext, priority)
+}
\ No newline at end of file
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirContextCompletionContributorBase.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirContextCompletionContributorBase.kt
index c48cff94643..e69de29bb2d 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirContextCompletionContributorBase.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirContextCompletionContributorBase.kt
@@ -1,16 +0,0 @@
-/*
- * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.idea.completion.contributors
-
-import org.jetbrains.kotlin.idea.completion.context.FirBasicCompletionContext
-import org.jetbrains.kotlin.idea.completion.context.FirNameReferencePositionContext
-import org.jetbrains.kotlin.idea.completion.context.FirRawPositionCompletionContext
-import org.jetbrains.kotlin.idea.frontend.api.KtAnalysisSession
-import org.jetbrains.kotlin.idea.frontend.api.scopes.KtScopeNameFilter
-
-internal abstract class FirContextCompletionContributorBase<C : FirNameReferencePositionContext>(
-    basicContext: FirBasicCompletionContext
-) : FirCompletionContributorBase<C>(basicContext)
\ No newline at end of file
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirImportDirectivePackageMembersCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirImportDirectivePackageMembersCompletionContributor.kt
index 1a4d2b88265..adc92a3c1ba 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirImportDirectivePackageMembersCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirImportDirectivePackageMembersCompletionContributor.kt
@@ -15,8 +15,9 @@ import org.jetbrains.kotlin.idea.completion.lookups.CallableInsertionStrategy
 import org.jetbrains.kotlin.idea.frontend.api.KtAnalysisSession
 
 internal class FirImportDirectivePackageMembersCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCompletionContributorBase<FirImportDirectivePositionContext>(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCompletionContributorBase<FirImportDirectivePositionContext>(basicContext, priority) {
     override fun KtAnalysisSession.complete(positionContext: FirImportDirectivePositionContext) {
         val reference = positionContext.explicitReceiver?.reference() ?: return
         val scope = getStaticScope(reference) ?: return
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirKeywordCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirKeywordCompletionContributor.kt
index 433d6a48d0b..c8c31c27944 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirKeywordCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirKeywordCompletionContributor.kt
@@ -28,8 +28,8 @@ import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.psi.*
 
-internal class FirKeywordCompletionContributor(basicContext: FirBasicCompletionContext) :
-    FirCompletionContributorBase<FirRawPositionCompletionContext>(basicContext) {
+internal class FirKeywordCompletionContributor(basicContext: FirBasicCompletionContext, priority: Int) :
+    FirCompletionContributorBase<FirRawPositionCompletionContext>(basicContext, priority) {
     private val keywordCompletion = KeywordCompletion(object : KeywordCompletion.LanguageVersionSettingProvider {
         override fun getLanguageVersionSetting(element: PsiElement) = element.languageVersionSettings
         override fun getLanguageVersionSetting(module: Module) = module.languageVersionSettings
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirPackageCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirPackageCompletionContributor.kt
index b93e4b6d677..3f6c57e4b92 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirPackageCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirPackageCompletionContributor.kt
@@ -15,7 +15,8 @@ import org.jetbrains.kotlin.idea.project.languageVersionSettings
 
 internal class FirPackageCompletionContributor(
     basicContext: FirBasicCompletionContext,
-) : FirCompletionContributorBase<FirRawPositionCompletionContext>(basicContext) {
+    priority: Int,
+) : FirCompletionContributorBase<FirRawPositionCompletionContext>(basicContext, priority) {
 
     override fun KtAnalysisSession.complete(positionContext: FirRawPositionCompletionContext) {
         val rootSymbol = if (positionContext !is FirNameReferencePositionContext || positionContext.explicitReceiver == null) {
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSameAsFileClassifierNameCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSameAsFileClassifierNameCompletionContributor.kt
index 7ae34d210ec..a3e4fa594a7 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSameAsFileClassifierNameCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSameAsFileClassifierNameCompletionContributor.kt
@@ -14,8 +14,9 @@ import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.renderer.render
 
 internal class FirSameAsFileClassifierNameCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCompletionContributorBase<FirClassifierNamePositionContext>(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCompletionContributorBase<FirClassifierNamePositionContext>(basicContext, priority) {
 
     override fun KtAnalysisSession.complete(positionContext: FirClassifierNamePositionContext) {
         if (positionContext.classLikeDeclaration is KtClassOrObject) {
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSuperEntryContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSuperEntryContributor.kt
index 5bc7fadd361..5596a4fae45 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSuperEntryContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirSuperEntryContributor.kt
@@ -18,7 +18,8 @@ import org.jetbrains.kotlin.name.Name
 
 internal class FirSuperEntryContributor(
     basicContext: FirBasicCompletionContext,
-) : FirContextCompletionContributorBase<FirSuperTypeCallNameReferencePositionContext>(basicContext) {
+    priority: Int,
+) : FirCompletionContributorBase<FirSuperTypeCallNameReferencePositionContext>(basicContext, priority) {
     override fun KtAnalysisSession.complete(positionContext: FirSuperTypeCallNameReferencePositionContext) {
         getSuperClassesAvailableForSuperCall(positionContext.nameExpression).forEach { superType ->
             val tailText = superType.classIdIfNonLocal?.asString()?.let { "($it)" }
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirTypeParameterConstraintNameInWhereClauseCompletionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirTypeParameterConstraintNameInWhereClauseCompletionContributor.kt
index f8d5c6f3587..b7cfc637983 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirTypeParameterConstraintNameInWhereClauseCompletionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirTypeParameterConstraintNameInWhereClauseCompletionContributor.kt
@@ -20,8 +20,9 @@ import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.renderer.render
 
 internal class FirTypeParameterConstraintNameInWhereClauseCompletionContributor(
-    basicContext: FirBasicCompletionContext
-) : FirCompletionContributorBase<FirTypeConstraintNameInWhereClausePositionContext>(basicContext) {
+    basicContext: FirBasicCompletionContext,
+    priority: Int
+) : FirCompletionContributorBase<FirTypeConstraintNameInWhereClausePositionContext>(basicContext, priority) {
 
     override fun KtAnalysisSession.complete(positionContext: FirTypeConstraintNameInWhereClausePositionContext) {
         val ownerSymbol = positionContext.typeParametersOwner.getSymbol() as? KtSymbolWithTypeParameters ?: return
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirWhenWithSubjectConditionContributor.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirWhenWithSubjectConditionContributor.kt
index 7a649cd75e8..6fb08fd7895 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirWhenWithSubjectConditionContributor.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/contributors/FirWhenWithSubjectConditionContributor.kt
@@ -40,7 +40,8 @@ import org.jetbrains.kotlin.renderer.render
 
 internal class FirWhenWithSubjectConditionContributor(
     basicContext: FirBasicCompletionContext,
-) : FirContextCompletionContributorBase<FirWithSubjectEntryPositionContext>(basicContext) {
+    priority: Int,
+) : FirCompletionContributorBase<FirWithSubjectEntryPositionContext>(basicContext, priority) {
     override fun KtAnalysisSession.complete(positionContext: FirWithSubjectEntryPositionContext) {
         val whenCondition = positionContext.whenCondition
         val whenExpression = whenCondition.parentOfType<KtWhenExpression>() ?: return
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/CompletionContributorGroupWeighter.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/CompletionContributorGroupWeighter.kt
new file mode 100644
index 00000000000..945ca6aeed5
--- /dev/null
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/CompletionContributorGroupWeighter.kt
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.completion.weighers
+
+import com.intellij.codeInsight.lookup.LookupElement
+import com.intellij.codeInsight.lookup.LookupElementWeigher
+import com.intellij.openapi.util.Key
+import org.jetbrains.kotlin.psi.UserDataProperty
+
+
+internal object CompletionContributorGroupWeigher {
+    object Weigher : LookupElementWeigher(WEIGHER_ID) {
+        override fun weigh(element: LookupElement): Comparable<*>? =
+            element.groupPriority
+    }
+
+    var LookupElement.groupPriority by UserDataProperty(Key<Int>("GROUP_PRIORITY"))
+
+
+    const val WEIGHER_ID = "kotlin.group.id"
+}
+
+
diff --git a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/Weighers.kt b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/Weighers.kt
index e80ad300d00..710f34b5053 100644
--- a/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/Weighers.kt
+++ b/idea/idea-fir/src/org/jetbrains/kotlin/idea/completion/weighers/Weighers.kt
@@ -19,6 +19,7 @@ internal object Weighers {
     fun addWeighersToCompletionSorter(sorter: CompletionSorter): CompletionSorter =
         sorter
             .weighBefore(PlatformWeighersIds.STATS, ExpectedTypeWeigher.Weigher)
+            .weighBefore(ExpectedTypeWeigher.WEIGHER_ID, CompletionContributorGroupWeigher.Weigher)
 
     private object PlatformWeighersIds {
         const val PREFIX = "prefix"