@Override
 public void visitParenthesizedExpression(GrParenthesizedExpression expression) {
   final PsiElement parent = expression.getParent();
   if (parent instanceof GroovyPsiElement) {
     ((GroovyPsiElement) parent).accept(this);
   } else {
     parent.accept(new GroovyPsiElementVisitor(this));
   }
 }
 @Override
 public void visitParenthesizedExpression(GrParenthesizedExpression expression) {
   final GrExpression operand = expression.getOperand();
   if (operand != null) operand.accept(this);
 }