Method get_supported_mapping

python/ccxt/base/exchange.py:5819–5823

(self, key, mapping={})

        return self.safe_value(fees, code)

    def get_supported_mapping(self, key, mapping={}):
        if key in mapping:
            return mapping[key]
        else:
            raise NotSupported(self.id + ' ' + key + ' does not have a value in mapping')

    def fetch_cross_borrow_rate(self, code: str, params={}):
        self.load_markets()