code: def _learners(self) -> tuple[Learner, ...]:
      return (self.matcher, self.blocker)
  
imports: from __future__ import annotations
  import logging
  import random
  from abc import ABC, abstractmethod
  from typing import TYPE_CHECKING, overload
  from warnings import warn
  import numpy
  import numpy.typing
  import sklearn.linear_model
  import dedupe.core
  import dedupe.training
label_desc: Use image node_id 3 for calling the DisagreementLearner obj's underlying member method code with example usage: obj._learners() and returns: self,  self