code: def set_subtask_result(self, result: SubtaskResult):
      self._results[result.subtask_id] = result
  
imports: import asyncio
  from collections import defaultdict
  from typing import List, Tuple, Set
  import pytest
  from .....None import oscar
  from .....typing import BandType
  from ....cluster import MockClusterAPI
  from ....subtask import Subtask, SubtaskResult, SubtaskStatus
  from ....task.supervisor.manager import TaskManagerActor
  from ...supervisor import SubtaskQueueingActor, SubtaskManagerActor, GlobalResourceManagerActor
  from ...worker import SubtaskExecutionActor
label_desc: Use image node_id 2 for calling the MockTaskManagerActor obj's underlying member method code with example usage: obj.set_subtask_result(result) without return types