diff --git a/compiler/frontend/src/org/jetbrains/jet/analyzer/AnalyzerUtil.kt b/compiler/frontend/src/org/jetbrains/jet/analyzer/AnalyzerUtil.kt
index 1166b659334..ccf1b871c1d 100644
--- a/compiler/frontend/src/org/jetbrains/jet/analyzer/AnalyzerUtil.kt
+++ b/compiler/frontend/src/org/jetbrains/jet/analyzer/AnalyzerUtil.kt
@@ -28,7 +28,7 @@ import org.jetbrains.jet.lang.types.ErrorUtils
 import org.jetbrains.jet.lang.resolve.BindingContext
 import org.jetbrains.jet.lang.resolve.BindingTraceContext
 import org.jetbrains.jet.lang.resolve.BindingTrace
-import org.jetbrains.jet.lang.resolve.DescriptorUtils
+import org.jetbrains.jet.lang.resolve.descriptorUtil.module
 
 public fun JetExpression.computeTypeInfoInContext(
         scope: JetScope,
@@ -68,4 +68,4 @@ public fun JetType?.safeType(expression: JetExpression): JetType {
     return ErrorUtils.createErrorType("Type for " + expression.getText())
 }
 
-private fun JetScope.getModule(): ModuleDescriptor = DescriptorUtils.getContainingModule(this.getContainingDeclaration())
+private fun JetScope.getModule(): ModuleDescriptor = this.getContainingDeclaration().module
diff --git a/compiler/tests/org/jetbrains/jet/jvm/compiler/MultiModuleJavaAnalysisCustomTest.kt b/compiler/tests/org/jetbrains/jet/jvm/compiler/MultiModuleJavaAnalysisCustomTest.kt
index cefc18ec8f4..722e970199b 100644
--- a/compiler/tests/org/jetbrains/jet/jvm/compiler/MultiModuleJavaAnalysisCustomTest.kt
+++ b/compiler/tests/org/jetbrains/jet/jvm/compiler/MultiModuleJavaAnalysisCustomTest.kt
@@ -28,7 +28,6 @@ import org.jetbrains.jet.lang.resolve.name.Name
 import org.jetbrains.jet.lang.resolve.name.FqName
 import org.jetbrains.jet.lang.descriptors.*
 import org.junit.Assert
-import org.jetbrains.jet.lang.resolve.DescriptorUtils
 import org.jetbrains.jet.cli.jvm.compiler.JetCoreEnvironment
 import org.jetbrains.jet.config.CompilerConfiguration
 import org.jetbrains.jet.cli.jvm.JVMConfigurationKeys
@@ -41,6 +40,7 @@ import org.jetbrains.jet.analyzer.ModuleInfo
 import java.util.HashMap
 import org.jetbrains.jet.analyzer.ModuleContent
 import org.jetbrains.jet.lang.types.ErrorUtils
+import org.jetbrains.jet.lang.resolve.descriptorUtil.module
 
 public class MultiModuleJavaAnalysisCustomTest : UsefulTestCase() {
 
@@ -157,7 +157,7 @@ public class MultiModuleJavaAnalysisCustomTest : UsefulTestCase() {
 
         val descriptorName = referencedDescriptor.getName().asString()
         val expectedModuleName = "<${descriptorName.toLowerCase().first().toString()}>"
-        val moduleName = DescriptorUtils.getContainingModule(referencedDescriptor).getName().asString()
+        val moduleName = referencedDescriptor.module.getName().asString()
         Assert.assertEquals(
                 "Java class $descriptorName in $context should be in module $expectedModuleName, but instead was in $moduleName",
                 expectedModuleName, moduleName
diff --git a/core/descriptors/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.kt b/core/descriptors/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.kt
index 5a8a4eee290..7926970d135 100644
--- a/core/descriptors/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.kt
+++ b/core/descriptors/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.kt
@@ -31,4 +31,7 @@ public fun DeclarationDescriptor.getImportableDescriptor(): DeclarationDescripto
         if (this is ConstructorDescriptor || DescriptorUtils.isClassObject(this)) getContainingDeclaration()!! else this
 
 public val DeclarationDescriptor.isExtension: Boolean
-    get() = this is CallableDescriptor && getExtensionReceiverParameter() != null
\ No newline at end of file
+    get() = this is CallableDescriptor && getExtensionReceiverParameter() != null
+
+public val DeclarationDescriptor.module: ModuleDescriptor
+    get() = DescriptorUtils.getContainingModule(this)
\ No newline at end of file
diff --git a/idea/src/org/jetbrains/jet/plugin/debugger/PositionManagerLibraryClassFileSearcher.kt b/idea/src/org/jetbrains/jet/plugin/debugger/PositionManagerLibraryClassFileSearcher.kt
index 787725b8bbd..054fd97414d 100644
--- a/idea/src/org/jetbrains/jet/plugin/debugger/PositionManagerLibraryClassFileSearcher.kt
+++ b/idea/src/org/jetbrains/jet/plugin/debugger/PositionManagerLibraryClassFileSearcher.kt
@@ -21,7 +21,6 @@ import org.jetbrains.jet.lang.resolve.kotlin.PackagePartClassUtils
 import org.jetbrains.jet.lang.psi.JetElement
 import org.jetbrains.jet.descriptors.serialization.JavaProtoBuf
 import org.jetbrains.jet.renderer.DescriptorRenderer
-import org.jetbrains.jet.plugin.caches.resolve.getLazyResolveSession
 import com.intellij.openapi.diagnostic.Logger
 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor
 import com.intellij.openapi.roots.libraries.LibraryUtil
@@ -37,6 +36,8 @@ import com.intellij.openapi.module.impl.scopes.JdkScope
 import com.intellij.openapi.roots.JdkOrderEntry
 import org.jetbrains.jet.lang.psi.JetPsiUtil
 import org.jetbrains.jet.lang.resolve.java.JvmClassName
+import org.jetbrains.jet.lang.resolve.descriptorUtil.module
+import org.jetbrains.jet.plugin.caches.resolve.resolveToDescriptor
 
 private val LOG = Logger.getInstance("org.jetbrains.jet.plugin.debugger")
 
@@ -58,13 +59,12 @@ fun findPackagePartInternalNameForLibraryFile(elementAt: JetElement): String? {
     val packagePartFile = findPackagePartFileNamesForElement(topLevelDeclaration).singleOrNull()
     if (packagePartFile != null) return packagePartFile
 
-    val resolveSession = topLevelDeclaration.getLazyResolveSession()
 
-    val descriptor = resolveSession.resolveToDescriptor(topLevelDeclaration)
+    val descriptor = topLevelDeclaration.resolveToDescriptor()
     if (descriptor !is CallableDescriptor) return null
 
     val packageFqName = topLevelDeclaration.getContainingJetFile().getPackageFqName()
-    val packageDescriptor = resolveSession.getModuleDescriptorForElement(topLevelDeclaration).getPackage(packageFqName)
+    val packageDescriptor = descriptor.module.getPackage(packageFqName)
     if (packageDescriptor == null) {
         reportError(topLevelDeclaration, descriptor)
         return null
diff --git a/idea/tests/org/jetbrains/jet/plugin/decompiler/textBuilder/DecompiledTextConsistencyTest.kt b/idea/tests/org/jetbrains/jet/plugin/decompiler/textBuilder/DecompiledTextConsistencyTest.kt
index 22082a8a29f..3b5b932fd85 100644
--- a/idea/tests/org/jetbrains/jet/plugin/decompiler/textBuilder/DecompiledTextConsistencyTest.kt
+++ b/idea/tests/org/jetbrains/jet/plugin/decompiler/textBuilder/DecompiledTextConsistencyTest.kt
@@ -25,7 +25,6 @@ import org.jetbrains.jet.lang.resolve.java.PackageClassUtils
 import com.intellij.openapi.project.Project
 import org.jetbrains.jet.lang.descriptors.ClassDescriptor
 import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor
-import org.jetbrains.jet.lang.resolve.DescriptorUtils
 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns
 import org.jetbrains.jet.lang.resolve.resolveTopLevelClass
 import org.jetbrains.jet.lang.descriptors.CallableMemberDescriptor
@@ -34,6 +33,7 @@ import org.jetbrains.jet.lang.resolve.java.TopDownAnalyzerFacadeForJVM
 import org.jetbrains.jet.lang.resolve.BindingTraceContext
 import org.jetbrains.jet.lang.resolve.name.ClassId
 import org.jetbrains.jet.lang.resolve.MemberComparator
+import org.jetbrains.jet.lang.resolve.descriptorUtil.module
 
 public class DecompiledTextConsistencyTest : JetLightCodeInsightFixtureTestCase() {
 
@@ -76,7 +76,7 @@ class ProjectBasedResolverForDecompiler(project: Project) : ResolverForDecompile
     override fun resolveDeclarationsInPackage(packageFqName: FqName): Collection<DeclarationDescriptor> {
         val packageView = module.getPackage(packageFqName) ?: return listOf()
         return packageView.getMemberScope().getAllDescriptors() filter {
-            it is CallableMemberDescriptor && DescriptorUtils.getContainingModule(it) != KotlinBuiltIns.getInstance().getBuiltInsModule()
+            it is CallableMemberDescriptor && it.module != KotlinBuiltIns.getInstance().getBuiltInsModule()
         } sortBy MemberComparator.INSTANCE
     }
 }
\ No newline at end of file