code: def api_address(self):
      return "OFFLINE"
  
imports: import logging
  from io import StringIO
  from neptune.common.utils import NoopObject
  from neptune.legacy.backend import BackendApiClient, LeaderboardApiClient
label_desc: Use image node_id 1 for calling the OfflineLeaderboardApiClient obj's underlying member method code with example usage: obj.api_address() and returns: str