OfflineAudioContext 构造函数

实现

factory OfflineAudioContext(numberOfChannels_OR_options,
    [int? numberOfFrames, num? sampleRate]) {
  if ((sampleRate is num) &&
      (numberOfFrames is int) &&
      (numberOfChannels_OR_options is int)) {
    return OfflineAudioContext._create_1(
        numberOfChannels_OR_options, numberOfFrames, sampleRate);
  }
  if ((numberOfChannels_OR_options is Map) &&
      numberOfFrames == null &&
      sampleRate == null) {
    var options_1 =
        convertDartToNative_Dictionary(numberOfChannels_OR_options);
    return OfflineAudioContext._create_2(options_1);
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}