public override int IndexOf(TNode node)
 => this.syntaxList.IndexOf((TSyntax)SyntaxWrapper.Unwrap(node));
 public override SeparatedSyntaxListWrapper <TNode> Insert(int index, TNode node)
 => new AutoWrapSeparatedSyntaxList <TSyntax>(this.syntaxList.Insert(index, (TSyntax)SyntaxWrapper.Unwrap(node)));
 public override bool Contains(TNode node)
 => this.syntaxList.Contains(SyntaxWrapper.Unwrap(node));