printError function Null safety

Future<int> printError(
  1. String message,
  2. {String appName = '',
  3. String path = ''}
)

Prints the appName, path and error message to stderr.

Implementation

Future<int> printError(String message,
    {String appName = '', String path = ''}) async {
  if (appName.isNotEmpty) {
    stderr.write('$appName: ');
  }
  if (path.isNotEmpty) {
    stderr.write('$path: ');
  }
  stderr.writeln(message);
  return exitFailure;
}