startMicDeviceTest method Null safety

Future<int?> startMicDeviceTest(
  1. int interval
)

Start mic test

Note: this API supports only the macOS and Windows platforms

Parameters:

Volume callback interval in ms

Returned value:

0: success; negative number: failure

Implementation

Future<int?> startMicDeviceTest(int interval
    ) {
  return _channel.invokeMethod('startMicDeviceTest', {
    "interval": interval
  });
}