code: def fake_nearby_preprocessor(impact_function):
      
      _ = impact_function  # NOQA
      from safe.test.utilities import load_test_vector_layer
      fake_layer = load_test_vector_layer(
          'gisv4',
          'impacts',
          'building-points-classified-vector.geojson',
          clone_to_memory=True)
      return fake_layer
docs: Fake nearby preprocessor.
  
      We can put here the function to generate contours or nearby places.
  
      It must return a layer with a specific layer_purpose.
  
      :return: The output layer.
      :rtype: QgsMapLayer