singleOptionValue function

String? singleOptionValue(
  1. ArgResults? argResults,
  2. String name
)

Implementation

String? singleOptionValue(ArgResults? argResults, String name) {
  if (argResults == null || argResults[name] == null) {
    return null;
  }
  if (argResults[name] is! String) {
    throw ArgumentError('Option "$name" is not a single option.');
  }
  return argResults[name];
}