'Returns a new AssetFinder
Returns
asset_finder : zipline.assets.AssetFinder'

@classmethod
def make_asset_finder(cls):

    return cls.enter_class_context(tmp_asset_finder(url=cls.make_asset_finder_db_url(), equities=cls.make_equity_info(), futures=cls.make_futures_info(), exchanges=cls.make_exchanges_info(), root_symbols=cls.make_root_symbols_info(), equity_supplementary_mappings=cls.make_equity_supplementary_mappings()))
