getPreviousFundingFeePeriodic method
Get previous funding fee periodically. https://bybit-exchange.github.io/docs/inverse/#t-mylastfundingfee
Implementation
void getPreviousFundingFeePeriodic(
{required String symbol, required Duration period}) {
log.d('ByBitRest.getPreviousFundingFeePeriodic');
streamGroup!.add(Stream.periodic(period, (_) {
return getPreviousFundingFee(symbol: symbol);
}).asyncMap((event) async => await event));
}