code: async def work_async(self):
          
          try:
              raise self._error
          except TypeError:
              pass
          except Exception as e:
              _logger.warning("%r", e)
              raise
          try:
              await self.lock_async()
              if self._closing:
                  _logger.debug("Connection unlocked but shutting down.")
                  return
              await self.loop.run_in_executor(self._executor, functools.partial(self._conn.do_work))
          except asyncio.TimeoutError:
              _logger.debug("Connection %r timed out while waiting for lock acquisition.", self.container_id)
          finally:
              self.release_async()
docs: Perform a single Connection iteration asynchronously.