code: def get(self, key):
      # Raises KeyError if key isn't in cache.
      return self.cache[key]
  
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 SimpleCacheActor obj's underlying member method code with example usage: obj.get(key) and returns: self