code: def search(
      self, item: typing.Any, n_neighbors: int, **kwargs
  ) -> tuple[list, list]:
      pass
  
file_path: river/river/neighbors/base.py
imports: from __future__ import annotations
  import abc
  import typing
  from river import base
label_desc: Use image node_id 3 for calling the BaseNN obj's underlying member method code with example usage: obj.search(item, n_neighbors) without return types