String? joinHeaderValues()

in lib/src/util.dart [138:143]

• 6 lines of code
• 4 McCabe index (conditional complexity)

String? joinHeaderValues(List<String>? values) {
  if (values == null) return null;
  if (values.isEmpty) return '';
  if (values.length == 1) return values.single;
  return values.join(',');
}