public static SyntaxTree ToggleMultiLineComment(this SyntaxTree syntaxTree, TextSpan textSpan)
{
if (syntaxTree == null)
{
throw new ArgumentNullException(nameof(syntaxTree));
}
var comment = syntaxTree.GetMultiLineComment(textSpan);
return(comment != null
? syntaxTree.UncommentMultiLineComment(comment)
: syntaxTree.CommentMultiLineComment(textSpan));
}