def METHOD_NAME(self):
    """
    Returns a list of all models in the shapefile
    """
    if fiona is None:
        print('fiona/GDAL is not installed properly!', sys.stderr)
        return []
    with fiona.open(self.shapefile_path, 'r') as shp:
        models = [polygon['properties']['code'] for polygon in shp]
    return models