private Document Delete(Document document, AttributeArgumentSyntax node)
{
var argumentList = node.FirstAncestorOrSelf<AttributeArgumentListSyntax>();
var newArgumentList = argumentList.RemoveNode(node, SyntaxRemoveOptions.KeepNoTrivia);
return document.ReplaceNodeAsync(argumentList, newArgumentList, CancellationToken.None)
.WaitAndGetResult_CodeModel(CancellationToken.None);
}