code: def test_undo_replace_with_jit(self):
      original_function = BertSelfAttention.forward
      replace_with_jit()
      undo_replace_with_jit()
      self.assertTrue(BertSelfAttention.forward is original_function)
  
imports: import unittest
  from mmf.modules.hf_layers import replace_with_jit, undo_replace_with_jit
label_desc: Use image node_id 1 for calling the TestHFLayers obj's underlying member method code with example usage: obj.test_undo_replace_with_jit() without return types