code: def __hash__(self):
      result = int(self._timestamp ^ (self._timestamp >> 32))
      result = 31 * result + hash(tuple(self._key))
      result = 31 * result + hash(self._namespace)
      return result
  
imports: import collections
  import time
  from enum import Enum
  from io import BytesIO
  from pyflink.common import Row
  from pyflink.datastream import TimerService
  from pyflink.fn_execution.datastream.timerservice import InternalTimer, K, N, InternalTimerService
label_desc: Use image node_id 5 for calling the InternalTimerImpl obj's underlying member method code with example usage: obj.__hash__() and returns: result