@Override
  public GrExpression getExpression() {
    final PsiElement nameElement = getNameElement();
    if (nameElement instanceof GrParenthesizedExpression) return ((GrParenthesizedExpression)nameElement).getOperand();
    if (nameElement instanceof GrExpression) return (GrExpression)nameElement;
    return null;
  }
@Override
  public GrExpression getExpression()