class_docstr: UnmanagedTrialHeartbeat updates the state on context enter/exit.
code: def close(
      self,
      exc_type: Optional[type] = None,
      exc_val: Optional[BaseException] = None,
      exc_tb: Optional[types.TracebackType] = None,
  ) -> "_Heartbeat":
      atexit.unregister(self._exit_handler)
  
      self._heartbeat.close()
  
      if exc_type is None:
          self._update_state(bindings.trialv1State.COMPLETED)
      else:
          self._update_state(bindings.trialv1State.ERROR)
  
      return self
  
imports: import atexit
  import logging
  import sys
  import threading
  import time
  import types
  from typing import Any, Optional, Union
  from determined.common import api
  from determined.common.api import bindings
label_desc: Use image node_id 4 for calling the _UnmanagedTrialHeartbeat obj's underlying member method code with example usage: obj.close(exc_type, exc_val, exc_tb) and returns: self