TResult IPgnSymbol.Accept <TResult>(PgnSymbolVisitor <TResult> visitor) => visitor.VisitBracketCloseSyntax(this);
 TResult IPgnSymbol.Accept <T, TResult>(PgnSymbolVisitor <T, TResult> visitor, T arg) => visitor.VisitBracketCloseSyntax(this, arg);
 void IPgnSymbol.Accept(PgnSymbolVisitor visitor) => visitor.VisitBracketCloseSyntax(this);