Add and use KtPropertyAccessor#getProperty()

compiler/frontend/src/org/jetbrains/kotlin/psi/KtPropertyAccessor.java

@@ -143,4 +143,9 @@ public class KtPropertyAccessor extends KtDeclarationStub<KotlinPropertyAccessor
     public boolean hasInitializer() {
         return getInitializer() != null;
     }
+
+    @NotNull
+    public KtProperty getProperty() {
+        return (KtProperty) getParent();
+    }
 }

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

@@ -160,10 +160,7 @@ public object LightClassUtil {
         }
 
         if (declaration is KtPropertyAccessor) {
-            val propertyParent = declaration.parent
-            assert(propertyParent is KtProperty) { "JetProperty is expected to be parent of accessor" }
-
-            declaration = propertyParent as KtProperty
+            declaration = declaration.property
         }
 
         if (declaration is KtConstructor<*>) {

compiler/tests/org/jetbrains/kotlin/renderer/AbstractDescriptorRendererTest.kt

@@ -97,8 +97,8 @@ public abstract class AbstractDescriptorRendererTest : KotlinTestWithEnvironment
             }
 
             override fun visitPropertyAccessor(accessor: KtPropertyAccessor) {
-                val parent = accessor.getParent() as KtProperty
-                val propertyDescriptor = getDescriptor(parent, container) as PropertyDescriptor
+                val property = accessor.property
+                val propertyDescriptor = getDescriptor(property, container) as PropertyDescriptor
                 if (accessor.isGetter()) {
                     descriptors.add(propertyDescriptor.getGetter()!!)
                 }

idea/src/org/jetbrains/kotlin/idea/debugger/stepping/KotlinBasicStepMethodFilter.kt

@@ -35,7 +35,7 @@ public class KotlinBasicStepMethodFilter(
         myTargetMethodName = when (resolvedElement) {
             is KtAnonymousInitializer -> "<init>"
             is KtConstructor<*> -> "<init>"
-            is KtPropertyAccessor -> JvmAbi.getterName((resolvedElement.parent as KtProperty).name!!)
+            is KtPropertyAccessor -> JvmAbi.getterName((resolvedElement.property).name!!)
             else -> resolvedElement.name!!
         }
     }

idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt

@@ -53,8 +53,7 @@ public class ChangeVariableMutabilityFix(element: KtNamedDeclaration, private va
         public val VAL_WITH_SETTER_FACTORY: KotlinSingleIntentionActionFactory = object: KotlinSingleIntentionActionFactory() {
             override fun createAction(diagnostic: Diagnostic): IntentionAction? {
                 val accessor = diagnostic.psiElement as KtPropertyAccessor
-                val property = accessor.parent as KtProperty
-                return ChangeVariableMutabilityFix(property, true)
+                return ChangeVariableMutabilityFix(accessor.property, true)
             }
         }
 

idea/src/org/jetbrains/kotlin/idea/refactoring/jetRefactoringUtil.kt

@@ -354,7 +354,7 @@ public fun <T> chooseContainerElement(
             object : PsiElementListCellRenderer<PsiElement>() {
                 private fun PsiElement.renderName(): String {
                     if (this is KtPropertyAccessor) {
-                        return (parent as KtProperty).renderName() + if (isGetter) ".get" else ".set"
+                        return property.renderName() + if (isGetter) ".get" else ".set"
                     }
                     if (this is KtObjectDeclaration && this.isCompanion()) {
                         return "Companion object of ${getStrictParentOfType<KtClassOrObject>()?.renderName() ?: "<anonymous>"}"