public virtual void VisitParenthesizedExpression(ParenthesizedExpression parenthesizedExpression)
{
StartNode(parenthesizedExpression);
LPar();
Space(policy.SpacesWithinParentheses);
parenthesizedExpression.Expression.AcceptVisitor(this);
Space(policy.SpacesWithinParentheses);
RPar();
EndNode(parenthesizedExpression);
}