FreeOpcUa / python-opcua

        self.MonitoredItemIds = []

        self._freeze = True

    def to_binary(self):

        packet = []

        packet.append(uabin.Primitives.UInt32.pack(self.SubscriptionId))

        packet.append(uabin.Primitives.UInt32.pack(self.MonitoringMode.value))

        packet.append(uabin.Primitives.Int32.pack(len(self.MonitoredItemIds)))

        for fieldname in self.MonitoredItemIds:

            packet.append(uabin.Primitives.UInt32.pack(fieldname))

        return b''.join(packet)

    @staticmethod

    def from_binary(data):

        self.ItemsToModify = []

        self._freeze = True

    def to_binary(self):

        packet = []

        packet.append(uabin.Primitives.UInt32.pack(self.SubscriptionId))

        packet.append(uabin.Primitives.UInt32.pack(self.TimestampsToReturn.value))

        packet.append(uabin.Primitives.Int32.pack(len(self.ItemsToModify)))

        for fieldname in self.ItemsToModify:

            packet.append(fieldname.to_binary())

        return b''.join(packet)

    @staticmethod

    def from_binary(data):

        self.ItemsToCreate = []

        self._freeze = True

    def to_binary(self):

        packet = []

        packet.append(uabin.Primitives.UInt32.pack(self.SubscriptionId))

        packet.append(uabin.Primitives.UInt32.pack(self.TimestampsToReturn.value))

        packet.append(uabin.Primitives.Int32.pack(len(self.ItemsToCreate)))

        for fieldname in self.ItemsToCreate:

            packet.append(fieldname.to_binary())

        return b''.join(packet)

    @staticmethod

    def from_binary(data):