code: def register_ray():
      """Register Ray Backend to be called with parallel_backend("ray")."""
      try:
          from ray.util.joblib.ray_backend import RayBackend
  
          register_parallel_backend("ray", RayBackend)
      except ImportError:
          msg = (
              "To use the ray backend you must install ray."
              "Try running 'pip install ray'."
              "See https://docs.ray.io/en/master/installation.html"
              "for more information."
          )
          raise ImportError(msg)
  
label_desc: Use image node_id 1 for calling a global function with example usage: register_ray() without return types