code: def send(self, rank, clear=False):
      self.ready_events[rank].set()
      if clear:
          self.ready_events[rank].clear()
  
imports: import asyncio
  import time
  from typing import List
  import numpy
  import ray
  import ray.experimental.internal_kv
  from ray._raylet import GcsClient
  from ray.util.collective.types import ReduceOp, torch_available
  from ray.util.queue import _QueueActor
label_desc: Use image node_id 2 for calling the SignalActor obj's underlying member method code with example usage: obj.send(rank, clear) without return types