Get ticker of the given contract. It must have been requested before
        with reqMktData with the same contract object. The ticker may not be
        ready yet if called directly after :meth:`.reqMktData`.

        Args:
            contract: Contract to get ticker for.

def ticker(self, contract: Contract) -> Ticker:
        """
        Get ticker of the given contract. It must have been requested before
        with reqMktData with the same contract object. The ticker may not be
        ready yet if called directly after :meth:`.reqMktData`.

        Args:
            contract: Contract to get ticker for.
        """
        return self.wrapper.tickers.get(id(contract))