'Constructs a RPC method frame and then sends it to the broker.
:param int channel_number: The channel number for the frame
:param pika.amqp_object.Method method: The method to send
:param tuple content: If set, is a content frame, is tuple of
properties and body.'

def _send_method(self, channel_number, method, content=None):

    if content:
        self._send_message(channel_number, method, content)
    else:
        self._send_frame(frame.Method(channel_number, method))
