Java Uast: Initial implementation

plugins/uast-java/testData/render/NestedClasses.txt

@@ -0,0 +1,14 @@
+default class _Dummy_ {
+    default inner class NestedClasses {
+        public class Nested {
+            default fun func1(): void {
+            }
+            
+        }
+        public inner class Inner {
+            default fun func2(): void {
+            }
+            
+        }
+    }
+}