'Called if the server sends a Basic.Return frame.
:param pika.frame.Method method_frame: The Basic.Return frame
:param pika.frame.Header header_frame: The content header frame
:param body: The message body
:type body: str or unicode'

def _on_return(self, method_frame, header_frame, body):

    if (not self.callbacks.process(self.channel_number, '_on_return', self, self, method_frame.method, header_frame.properties, body)):
        LOGGER.warning('Basic.Return    received    from    server    (%r,    %r)', method_frame.method, header_frame.properties)
