code: def __init__(self, backend_name: str, lookup_address: str):
      self._backend_name = backend_name
      self._lookup_address = lookup_address
      self._backend: Optional[AbstractClusterBackend] = None
  
imports: from typing import Optional
  from ....None import oscar
  from ...core import NodeRole
  from ..backends import AbstractClusterBackend, get_cluster_backend
label_desc: Use image node_id 1 to create a new NodeAllocatorActor object from inherited base classes: mo with example: obj = NodeAllocatorActor(backend_name, lookup_address)