public virtual void PostWalk(RaiseStatement node) { }
// RaiseStatement public virtual bool Walk(RaiseStatement node) { return(true); }
public override void PostWalk(RaiseStatement node) { }
// RaiseStatement public override bool Walk(RaiseStatement node) { return(Contains(node)); }
// RaiseStatement public override bool Walk(RaiseStatement node) { return(false); }