code: def _ray_presubmit(self, task, key, deps):
      try:
          return ray.get(self.cache_actor.get.remote(str(key)))
      except KeyError:
          return None
  
imports: import ray
  import dask.array
  from ray.util.dask import RayDaskCallback, ray_dask_get
  from timeit import default_timer
label_desc: Use image node_id 2 for calling the SimpleCacheCallback obj's underlying member method code with example usage: obj._ray_presubmit(task, key, deps) and returns: ray, None