code: def mock_unflatten(mocker):
      yield mocker.patch(
          "graphviz.backend.unflattening.unflatten", autospec=True
      )
  
file_path: graphviz/tests/conftest.py
imports: import pytest
label_desc: Use image node_id 11 for calling a global function with example usage: mock_unflatten(mocker) without return types