isLocalClass should work for nested local classes (IDEA-156777)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting/NestedLocalClasses.java

@@ -0,0 +1,26 @@
+
+class Program {
+  public static void main(String[] args) {
+    int[] arr = {1,2,3};
+    final int x = arr.length;
+    {
+      class C {
+        class D {
+          int bar() {
+            return x;
+          }
+        }
+      }
+
+      new Runnable() {
+        class D {
+          int bar() {
+            return x;
+          }
+        }
+
+        public void run() {}
+      }.run();
+    }
+  }
+}