class_docstr: Unit test multi decorator Class
  TODO: Docstring
docstr: Unit test check contributions 2
docstr_tok: ["Unit","test","check","contributions","2"]
code: def test_check_contributions_2(self):
      """
      Unit test check contributions 2
      """
      backend = Mock()
      backend.check_contributions = Mock(
          side_effect=[True, False, True]
      )
      state = MultiDecorator(backend)
      output = state.check_contributions([1, 2, 3], Mock())
      assert not output
  
imports: import unittest
  from unittest.mock import patch, Mock
  import numpy
  import pandas
  from shapash.explainer.multi_decorator import MultiDecorator
label_desc: Use image node_id 8 for calling the TestMultiDecorator obj's underlying member method code with example usage: obj.test_check_contributions_2() without return types