public static SourceMap Identity(string content, string fileName) { var sb = new StringBuilder(); sb.Append("AAAA"); var endsWithNL = SourceMapBuilder.EndsWithNewLine(content); var len = content.Length - (endsWithNL ? 1 : 0); for (var i = 0; i < len; i++) { if (content[i] == '\n') { sb.Append(";AACA"); } } if (endsWithNL) { sb.Append(';'); } return(new(new() { fileName }) { mappings = sb.ToString() });