Request and return a list of snapshot tickers.
        The list is returned when all tickers are ready.

        This method is blocking.

        Args:
            contracts: Contracts to get tickers for.
            regulatorySnapshot: Request NBBO snapshots (may incur a fee).

def reqTickers(
            self, *contracts: List[Contract],
            regulatorySnapshot: bool = False) -> List[Ticker]:
        """
        Request and return a list of snapshot tickers.
        The list is returned when all tickers are ready.

        This method is blocking.

        Args:
            contracts: Contracts to get tickers for.
            regulatorySnapshot: Request NBBO snapshots (may incur a fee).
        """
        return self._run(
            self.reqTickersAsync(
                *contracts, regulatorySnapshot=regulatorySnapshot))