code: def test_networkx_backing_store_node_related_methods(
      networkx_store: NetworkXBackingStore, verify_key: SyftVerifyKey
  ) -> None:
      """
      Test the methods related to nodes of the NetworkXBackingStore:
          get(), set(), is_parent(), edges(), nodes(), delete(), update() methods
      """
      assert isinstance(networkx_store.db, nx.DiGraph)
  
      # set and get an action object node
      action_obj_node: NodeActionData = create_action_obj_node(
          verify_key
      )
      networkx_store.set(uid=action_obj_node.id, data=action_obj_node)
      assert len(networkx_store.nodes()) == 1
      assert (
          networkx_store.get(uid=action_obj_node.id) == action_obj_node
      )
  
      # set and get an action node
      action_node: NodeActionData = create_action_node(verify_key)
      networkx_store.set(uid=action_node.id, data=action_node)
      assert networkx_store.get(uid=action_node.id) == action_node
      assert len(networkx_store.nodes()) == 2
      assert len(networkx_store.edges()) == 0
      assert (
          networkx_store.is_parent(
              parent=action_obj_node.id, child=action_node.id
          )
          is False
      )
  
      # update the action node
      update_node = NodeActionDataUpdate(
          status=ExecutionStatus.DONE, is_mutagen=True, is_mutated=True
      )
      for key, val in update_node.to_dict(exclude_empty=True).items():
          setattr(action_node, key, val)
      networkx_store.update(uid=action_node.id, data=action_node)
      updated_action_node = networkx_store.get(uid=action_node.id)
  
      assert updated_action_node.status == ExecutionStatus.DONE
      assert updated_action_node.updated_at == update_node.updated_at
      assert updated_action_node.is_mutagen == update_node.is_mutagen
      assert updated_action_node.is_mutated == update_node.is_mutated
  
      # remove a node
      assert networkx_store.exists(uid=action_obj_node.id) is True
      networkx_store.delete(uid=action_obj_node.id)
      assert len(networkx_store.nodes()) == 1
      assert networkx_store.exists(uid=action_obj_node.id) is False
  
      # remove the remaining node
      networkx_store.delete(uid=action_node.id)
      assert len(networkx_store.nodes()) == 0
  
imports: import os
  from pathlib import Path
  import tempfile
  from threading import Thread
  import networkx
  from result import Err
  from syft.node.credentials import SyftVerifyKey
  from syft.service.action.action_graph import ExecutionStatus
  from syft.service.action.action_graph import InMemoryActionGraphStore
  from syft.service.action.action_graph import InMemoryGraphConfig
  from syft.service.action.action_graph import InMemoryStoreClientConfig
  from syft.service.action.action_graph import NetworkXBackingStore
  from syft.service.action.action_graph import NodeActionData
  from syft.service.action.action_graph import NodeActionDataUpdate
  from syft.service.action.action_graph import NodeType
  from syft.service.action.action_graph_service import ExecutionStatusPartitionKey
  from syft.service.action.action_object import Action
  from syft.service.action.action_object import ActionObject
  from syft.store.document_store import QueryKeys
  from syft.store.locks import NoLockingConfig
  from syft.types.datetime import DateTime
  from syft.types.syft_metaclass import Empty
  from syft.types.uid import UID
  from .fixtures import create_action_node
  from .fixtures import create_action_obj_node
label_desc: Use image node_id 7 for calling a global function with example usage: test_networkx_backing_store_node_related_methods(networkx_store, verify_key) without return types