LC: commonize facade for multi-file class

analysis/decompiled/light-classes-for-decompiled/src/org/jetbrains/kotlin/analysis/decompiled/light/classes/KtLightClassForDecompiledFacade.kt

@@ -25,4 +25,6 @@ internal class KtLightClassForDecompiledFacade(
     override fun getName(): String = super<KtLightClassForFacade>.getName()
     override val facadeClassFqName: FqName get() = file.javaFileFacadeFqName
     override val originKind: LightClassOriginKind get() = LightClassOriginKind.BINARY
+
+    override val multiFileClass: Boolean = false
 }

analysis/light-classes-base/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForFacade.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.psi.KtFile
 interface KtLightClassForFacade : KtLightClass {
     val facadeClassFqName: FqName
     val files: Collection<KtFile>
+    val multiFileClass: Boolean
 
     override fun getName(): String = facadeClassFqName.shortName().asString()
 }

analysis/light-classes-base/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForFacadeBase.kt

@@ -35,12 +35,12 @@ abstract class KtLightClassForFacadeBase constructor(
 ) : KtLightClassBase(files.first().manager), KtLightClassForFacade {
     private val firstFileInFacade by lazyPub { files.first() }
 
-    val isMultiFileClass: Boolean by lazyPub {
+    override val multiFileClass: Boolean by lazyPub {
         files.size > 1 || firstFileInFacade.isJvmMultifileClassFile
     }
 
     private val _modifierList: PsiModifierList by lazyPub {
-        if (isMultiFileClass)
+        if (multiFileClass)
             LightModifierList(manager, KotlinLanguage.INSTANCE, PsiModifier.PUBLIC, PsiModifier.FINAL)
         else
             createModifierListForSimpleFacade()

analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/classes/SymbolLightClassForFacade.kt

@@ -102,7 +102,7 @@ internal class SymbolLightClassForFacade(
         }
     }
 
-    private val multiFileClass: Boolean get() = files.size > 1 || firstFileInFacade.isJvmMultifileClassFile
+    override val multiFileClass: Boolean get() = files.size > 1 || firstFileInFacade.isJvmMultifileClassFile
 
     context(KtAnalysisSession)
     private fun loadFieldsFromFile(

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/ultraKtLightClassForFacade.kt

@@ -39,7 +39,7 @@ class KtUltraLightClassForFacade(
     }
 
     override val givenAnnotations: List<KtLightAbstractAnnotation>?
-        get() = if (isMultiFileClass) emptyList() else _givenAnnotations
+        get() = if (multiFileClass) emptyList() else _givenAnnotations
 
     override fun createModifierListForSimpleFacade(): PsiModifierList = _modifierListForSimpleFacade
 
@@ -94,7 +94,7 @@ class KtUltraLightClassForFacade(
     override fun createOwnFields(): List<KtLightField> = hashSetOf<String>().let { nameCache ->
         filesWithSupportsWithCreators.flatMap { (file, _, creator) ->
             val allProperties = file.declarations.filterIsInstance<KtProperty>()
-            val properties = if (isMultiFileClass) allProperties.filter { it.hasModifier(KtTokens.CONST_KEYWORD) } else allProperties
+            val properties = if (multiFileClass) allProperties.filter { it.hasModifier(KtTokens.CONST_KEYWORD) } else allProperties
             properties.mapNotNull {
                 creator.createPropertyField(it, nameCache, forceStatic = true)
             }
@@ -106,7 +106,7 @@ class KtUltraLightClassForFacade(
             loadMethodsFromFile(file, support, creator, result)
         }
 
-        if (!isMultiFileClass) result else result.filterNot { it.hasModifierProperty(PsiModifier.PRIVATE) }
+        if (!multiFileClass) result else result.filterNot { it.hasModifierProperty(PsiModifier.PRIVATE) }
     }
 
     override fun copy(): KtLightClassForFacade = KtUltraLightClassForFacade(facadeClassFqName, files, filesWithSupports)