code: def __init__(self, timestamp: int, key: K, namespace: N):
      self._timestamp = timestamp
      self._key = key
      self._namespace = namespace
  
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 1 to create a new InternalTimerImpl object from inherited base classes: InternalTimer with example: obj = InternalTimerImpl(timestamp, key, namespace)