@Override
        public void visitElement(@NotNull PsiElement element) {
          if (element instanceof GrReferenceExpression) {
            super.visitElement(element);
          }
          else if (element instanceof GrMethodCall) {
            super.visitElement(((GrMethodCall)element).getInvokedExpression());
          }
          else if (element instanceof GrParenthesizedExpression) {
            GrExpression operand = ((GrParenthesizedExpression)element).getOperand();
            if (operand != null) super.visitElement(operand);
          }
        }
@Override
        public void visitElement(@NotNull PsiElement element)