Code cleanup: several inspections applied

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

@@ -475,7 +475,7 @@ class KotlinIndicesHelper(
     private fun KtNamedDeclaration.resolveToDescriptorsWithHack(
             psiFilter: (KtDeclaration) -> Boolean): Collection<DeclarationDescriptor> {
         if (containingKtFile.isCompiled) { //TODO: it's temporary while resolveToDescriptor does not work for compiled declarations
-            return resolutionFacade.resolveImportReference(moduleDescriptor, fqName!!).filterIsInstance<DeclarationDescriptor>()
+            return resolutionFacade.resolveImportReference(moduleDescriptor, fqName!!)
         }
         else {
             val translatedDeclaration = declarationTranslator(this) ?: return emptyList()

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

@@ -168,7 +168,7 @@ fun String.quoteIfNeeded(): String = if (KotlinNameSuggester.isIdentifier(this))
 fun String.unquote(): String = KtPsiUtil.unquoteIdentifier(this)
 
 fun FqName.quoteSegmentsIfNeeded(): String {
-    return pathSegments().map { it.asString().quoteIfNeeded() }.joinToString(".")
+    return pathSegments().joinToString(".") { it.asString().quoteIfNeeded() }
 }
 
 fun FqName.quoteIfNeeded() = FqName(quoteSegmentsIfNeeded())

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

@@ -176,7 +176,7 @@ fun <T : KtDeclaration> insertMembersAfter(
             val body = classOrObject.getOrCreateBody()
 
             var afterAnchor = anchor ?: findInsertAfterAnchor(editor, body) ?: return@runWriteAction emptyList<T>()
-            otherMembers.mapNotNullTo(insertedMembers) {
+            otherMembers.mapTo(insertedMembers) {
                 if (classOrObject is KtClass && classOrObject.isEnum()) {
                     val enumEntries = classOrObject.declarations.filterIsInstance<KtEnumEntry>()
                     val bound = (enumEntries.lastOrNull() ?: classOrObject.allChildren.firstOrNull { it.node.elementType == KtTokens.SEMICOLON })