code: def test_user_agent_with_library_name_multiple_missing(
      self, mock_is_torch_available: Mock, mock_is_tf_available: Mock
  ) -> None:
      mock_is_torch_available.return_value = False
      mock_is_tf_available.return_value = False
      self.assertNotIn("torch", self._get_user_agent())
      self.assertNotIn("tensorflow", self._get_user_agent())
  
imports: import unittest
  from unittest.mock import Mock, patch
  from huggingface_hub.utils import get_hf_hub_version, get_python_version
  from huggingface_hub.utils._headers import _deduplicate_user_agent, _http_user_agent, build_hf_headers
  from .testing_utils import handle_injection_in_test
label_desc: Use image node_id 3 for calling the TestUserAgentHeadersUtil obj's underlying member method code with example usage: obj.test_user_agent_with_library_name_multiple_missing(mock_is_torch_available, mock_is_tf_available) without return types