Cleanup: apply "Use synthetic property access syntax"

idea/idea-core/src/org/jetbrains/kotlin/idea/core/KotlinIndicesHelper.kt

@@ -472,7 +472,7 @@ class KotlinIndicesHelper(
 
     private fun KtNamedDeclaration.resolveToDescriptorsWithHack(
             psiFilter: (KtDeclaration) -> Boolean): Collection<DeclarationDescriptor> {
-        if (getContainingKtFile().isCompiled) { //TODO: it's temporary while resolveToDescriptor does not work for compiled declarations
+        if (containingKtFile.isCompiled) { //TODO: it's temporary while resolveToDescriptor does not work for compiled declarations
             return resolutionFacade.resolveImportReference(moduleDescriptor, fqName!!).filterIsInstance<DeclarationDescriptor>()
         }
         else {

idea/idea-core/src/org/jetbrains/kotlin/idea/core/Utils.kt

@@ -102,7 +102,7 @@ fun ImplicitReceiver.asExpression(resolutionScope: LexicalScope, psiFactory: KtP
 
 fun KtImportDirective.targetDescriptors(resolutionFacade: ResolutionFacade = this.getResolutionFacade()): Collection<DeclarationDescriptor> {
     // For codeFragments imports are created in dummy file
-    if (this.getContainingKtFile().doNotAnalyze != null) return emptyList()
+    if (this.containingKtFile.doNotAnalyze != null) return emptyList()
     val nameExpression = importedReference?.getQualifiedElementSelector() as? KtSimpleNameExpression ?: return emptyList()
     return nameExpression.mainReference.resolveToDescriptors(resolutionFacade.analyze(nameExpression))
 }

idea/idea-core/src/org/jetbrains/kotlin/idea/core/psiModificationUtils.kt

@@ -170,7 +170,7 @@ fun PsiElement.deleteSingle() {
 }
 
 fun KtClass.getOrCreateCompanionObject() : KtObjectDeclaration {
-    getCompanionObjects().firstOrNull()?.let { return it }
+    companionObjects.firstOrNull()?.let { return it }
     return addDeclaration(KtPsiFactory(this).createCompanionObject())
 }