private static async Task <Document> MakeMultiline( Document document, ArgumentListSyntax argumentList, CancellationToken cancellationToken) { var arguments = argumentList.Arguments.ToList(); if (arguments.Count == 0) { return(document); } var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false); if (tree == default) { return(document); } var currentIndent = argumentList.EstimateIndent(tree, cancellationToken); var indent = currentIndent + Settings.IndentOneLevel; return(await RewriteArgumentList( document, argumentList, Settings.EndOfLine, Settings.EndOfLine, SF.Whitespace(indent), cancellationToken)); }