'Add a callback to be notified when RabbitMQ has sent a
``Connection.Unblocked`` frame letting publishers know it\'s ok
to start publishing again. The callback will be passed the
``Connection.Unblocked`` method frame.
:param method callback_method: Callback to call on
`Connection.Unblocked`, having the signature
`callback_method(pika.frame.Method)`, where the method frame\'s
`method` member is of type `pika.spec.Connection.Unblocked`'

def add_on_connection_unblocked_callback(self, callback_method):

    self.callbacks.add(0, spec.Connection.Unblocked, callback_method, False)
