code: def test_head_pruning(self):
      pass
  
imports: import unittest
  from transformers import EsmConfig, is_torch_available
  from transformers.testing_utils import TestCasePlus, require_torch, slow, torch_device
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor, random_attention_mask
label_desc: Use image node_id 9 for calling the EsmFoldModelTest obj's underlying member method code with example usage: obj.test_head_pruning() without return types