input: 
  def load_json_fixture(fixture_file: str, fixture_folder: str) -> int:
      """ Loads a JSON fixture file, extracts properties from it, creates Property objects, and saves them to the database.
      Returns the number of Property objects saved.
      >>> load_json_fixture('properties.json', 'models/fixtures')
      3
      >>> load_json_fixture('empty.json', 'models/fixtures')
      0
      """
      properties_to_save = []
      path = os.path.sep.join([os.path.abspath('.'),
                               'app',
                               fixture_folder,
                               fixture_file])
      with open(path) as file_:
          data = json.load(file_)
      properties = data['properties']
      for property_ in properties:
          property_.pop('id')
          properties_to_save.append(Property(**property_))
      Property.objects.insert(properties_to_save)
  
      return len(properties_to_save)
  
output:     properties_to_save = []
      path = os.path.sep.join([os.path.abspath('.'),
                               'app',
                               fixture_folder,
                               fixture_file])
      with open(path) as file_:
          data = json.load(file_)
      properties = data.get('properties', [])
      for property_ in properties:
          property_.pop('id', None)
          properties_to_save.append(Property(**property_))
      Property.objects.insert(properties_to_save)
  
      return len(properties_to_save)