code: def test_hotflip_num_ex_multi_input(self, num_examples: int):
      config = {
          **_CONFIG_REGRESSION,
          hotflip.NUM_EXAMPLES_KEY: num_examples,
      }
      counterfactuals = self.hotflip.generate(
          _STSB_EXAMPLE, self.regression_model, None, config
      )
      self.assertLen(counterfactuals, num_examples)
  
file_path: lit/lit_nlp/components/hotflip_int_test.py
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.components import hotflip
  from lit_nlp.examples.models import glue_models
  import numpy
  from lit_nlp.lib import file_cache
label_desc: Use image node_id 4 for calling the HotflipIntegrationTest obj's underlying member method code with example usage: obj.test_hotflip_num_ex_multi_input(num_examples) without return types