findAvaliableServicesInAHost method Null safety

Future<String?> findAvaliableServicesInAHost(
  1. String host,
  2. int startPort,
  3. int endPort
)

Implementation

static Future<String?> findAvaliableServicesInAHost(
    String host, int startPort, int endPort) async {
  final String? json = await _channel.invokeMethod(
      'find_services_in_a_host', <String, dynamic>{
    'host': host,
    'startPort': startPort,
    'endPort': endPort
  });

  if (json == "") {
    return null;
  }

  return json;
}