public virtual void VisitGroupClause(GroupClauseSyntax node)
{
DefaultVisit(node);
}
public static GroupClauseSyntax GroupClause(ExpressionSyntax groupExpression = null, ExpressionSyntax byExpression = null)
{
var result = new GroupClauseSyntax();
result.GroupExpression = groupExpression;
result.ByExpression = byExpression;
return result;
}