class_docstr: Base class for ranking models.
  
  Parameters
  ----------
  seed
      Random number generation seed. Set this for reproducibility.
class_docstr_tok: ["Base","class","for","ranking","models",".","Parameters","--","--","--","--","--","seed","Random","number","generation","seed",".","Set","this","for","reproducibility","."]
code: def _unit_test_skips(self):
      return {"check_emerging_features", "check_disappearing_features"}
  
file_path: river/river/reco/base.py
imports: from __future__ import annotations
  import abc
  import numbers
  import random
  import typing
  from river import base
label_desc: Use image node_id 6 for calling the Ranker obj's underlying member method code with example usage: obj._unit_test_skips() and returns: unknown