code: def _try_inline_read(self) -> None:
          
          # See if we've already got the data from a previous read
          pos = self._find_read_pos()
          if pos is not None:
              self._read_from_buffer(pos)
              return
          self._check_closed()
          pos = self._read_to_buffer_loop()
          if pos is not None:
              self._read_from_buffer(pos)
              return
          # We couldn't satisfy the read inline, so make sure we're
          # listening for new data unless the stream is closed.
          if not self.closed():
              self._add_io_state(ioloop.IOLoop.READ)
docs: Attempt to complete the current read operation from buffered data.
  
          If the read can be completed without blocking, schedules the
          read callback on the next IOLoop iteration; otherwise starts
          listening for reads on the socket.