docstr: Update IOLoop handler with state.
  
  zmq FD is always read-only.
docstr_tok: ["Update","IOLoop","handler","with","state",".","zmq","FD","is","always","read-only","."]
code: def _update_handler(self, state):
      """Update IOLoop handler with state.
  
      zmq FD is always read-only.
      """
      self._schedule_remaining_events()
  
imports: from collections import namedtuple, deque
  from itertools import chain
  from zmq import EVENTS, POLLOUT, POLLIN
  import zmq
label_desc: Use image node_id 22 for calling the _AsyncSocket obj's underlying member method code with example usage: obj._update_handler(state) without return types