def reject(opts = {})
      @server.send(Protocol::Basic::Reject.new(opts.merge(:delivery_tag => properties[:delivery_tag])))
    end
def reject(opts = {})
      @server.send(Protocol::Basic::Reject.new(opts.merge(:delivery_tag => properties[:delivery_tag])))
    end
Reject this message (XXX currently unimplemented in rabbitmq)
 * :requeue => true | false (default false)