code: private ClassNode makeType(ClassNode cn, boolean usingClass) {
          if (usingClass) {
              ClassNode clazzType = CLASS_Type.getPlainNodeReference();
              clazzType.setGenericsTypes(new GenericsType[] {new GenericsType(cn)});
              return clazzType;
          } else {
              return cn;
          }
      }
docs: wrap type in Class<> if usingClass==true