code: def test_headers(self):
      e1 = errors.InvalidArgumentError()
      e2 = errors.InvalidArgumentError()
      self.assertEmpty(e1.headers)
      self.assertIsNot(e1.headers, e2.headers)
  
imports: from tensorboard import errors
  from tensorboard import test
label_desc: Use image node_id 4 for calling the InvalidArgumentErrorTest obj's underlying member method code with example usage: obj.test_headers() without return types