code: def _unit_test_skips(self):  # noqa
      return {
          "check_emerging_features",
          "check_disappearing_features",
      }
  
imports: from __future__ import annotations
  import copy
  import functools
  import pandas
  from sklearn import base
  from sklearn import exceptions
  from river import base
label_desc: Use image node_id 4 for calling the SKL2RiverBase obj's underlying member method code with example usage: obj._unit_test_skips() and returns: unknown