code: def send(self):
          
          # Prepare the watch to receive something.
          cookie = self._prepare()
  
          # Send it.
          self._send_object(cookie)
  
          # Commit it.
          self._commit(cookie)
  
          # Install it.
          self._install(cookie)
docs: Sends the object to the watch. Block until completion, or raises :exc:`.PutBytesError` on failure.
  
          During transmission, a "progress" event will be periodically emitted with the following signature: ::
  
             (sent_this_interval, sent_so_far, total_object_size)