def fetch_funding_fee(self, code, params={}):
    if (not self.has['fetchFundingFees']):
        self.raise_error(NotSupported, details='fetch_funding_fee() not supported yet')
    return self.fetch_funding_fees(params)
def fetch_funding_fee(self, code, params={}):
    if (not self.has['fetchFundingFees']):
        self.raise_error(NotSupported, details='fetch_funding_fee() not supported yet')
    return self.fetch_funding_fees(params)