Cancel market data subscription.

        https://interactivebrokers.github.io/tws-api/market_scanners.html

        Args:
            dataList: The scan data list that was obtained from
                :meth:`.reqScannerSubscription`.

def cancelScannerSubscription(self, dataList: ScanDataList):
        """
        Cancel market data subscription.

        https://interactivebrokers.github.io/tws-api/market_scanners.html

        Args:
            dataList: The scan data list that was obtained from
                :meth:`.reqScannerSubscription`.
        """
        self.client.cancelScannerSubscription(dataList.reqId)
        self.wrapper.endSubscription(dataList)