def fetch_order_trades(self, id, symbol=None, since=None, limit=None, params={}):
    request = {'order_id': id}
    return self.fetch_my_trades(symbol, since, limit, self.extend(request, params))
def fetch_order_trades(self, id, symbol=None, since=None, limit=None, params={}):
    request = {'order_id': id}
    return self.fetch_my_trades(symbol, since, limit, self.extend(request, params))