public virtual void VisitCommentSyntax(PgnCommentSyntax node) => DefaultVisit(node);
public override IGreenPgnSymbol VisitCommentSyntax(PgnCommentSyntax node) => node.Green;
public virtual void VisitCommentSyntax(PgnCommentSyntax node) => DefaultVisit(node);
public override IGreenPgnSymbol VisitCommentSyntax(PgnCommentSyntax node) => node.Green;