code: private void validateReturnJsDoc(Node n, JSDocInfo info) {
      if (!n.isReturn() || info == null) {
        return;
      }
      // @type is handled in validateTypeAnnotations method.
      if (info.containsDeclaration() && !info.hasType()) {
        report(n, JSDOC_ON_RETURN);
      }
    }
docs: Checks that there are no annotations on return.