Introduce "Redundant return label" inspection #KT-25270 Fixed

compiler/psi/src/org/jetbrains/kotlin/psi/VisitorWrappers.kt

@@ -402,3 +402,11 @@ fun qualifiedExpressionRecursiveVisitor(block: (KtQualifiedExpression) -> Unit)
             block(qualifiedExpression)
         }
     }
+
+fun returnExpressionVisitor(block: (KtReturnExpression) -> Unit) =
+    object : KtVisitorVoid() {
+        override fun visitReturnExpression(returnExpression: KtReturnExpression) {
+            super.visitReturnExpression(returnExpression)
+            block(returnExpression)
+        }
+    }

compiler/psi/src/org/jetbrains/kotlin/psi/psiUtil/psiUtils.kt

@@ -130,6 +130,10 @@ inline fun <reified T : PsiElement, reified V : PsiElement, reified U : PsiEleme
     return PsiTreeUtil.getParentOfType(this, T::class.java, V::class.java, U::class.java)
 }
 
+inline fun <reified T : PsiElement> PsiElement.getParentOfType(strict: Boolean, vararg stopAt: Class<out PsiElement>): T? {
+    return PsiTreeUtil.getParentOfType(this, T::class.java, strict, *stopAt)
+}
+
 inline fun <reified T : PsiElement> PsiElement.getStrictParentOfType(): T? {
     return PsiTreeUtil.getParentOfType(this, T::class.java, true)
 }