pack method
Abstract pack method to be implemented by subclasses.
Implementation
@override
Uint8List pack() {
final header = <String, dynamic>{'type': 'control', 'method': method};
if (method == "close") {
final closeStatus = statusCode ?? ControlCloseStatus.normal.code;
header['status_code'] = closeStatus;
if (message != null) {
header['message'] = message;
}
}
return packMessage(header);
}