Web socket status codes used when closing a web socket connection.

abstract class WebSocketStatus {
 static const int NORMAL_CLOSURE = 1000;
 static const int GOING_AWAY = 1001;
 static const int PROTOCOL_ERROR = 1002;
 static const int UNSUPPORTED_DATA = 1003;
 static const int RESERVED_1004  = 1004;
 static const int NO_STATUS_RECEIVED = 1005;
 static const int ABNORMAL_CLOSURE = 1006;
 static const int INVALID_FRAME_PAYLOAD_DATA = 1007;
 static const int POLICY_VIOLATION = 1008;
 static const int MESSAGE_TOO_BIG = 1009;
 static const int MISSING_MANDATORY_EXTENSION = 1010;
 static const int INTERNAL_SERVER_ERROR = 1011;
 static const int RESERVED_1015 = 1015;
}