Subscribe to tick-by-tick data and return the Ticker that
        holds the ticks in ticker.tickByTicks.

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

        Args:
            contract: Contract of interest.
            tickType: One of  'Last', 'AllLast', 'BidAsk' or 'MidPoint'.
            numberOfTicks: Number of ticks or 0 for unlimited.
            ignoreSize: Ignore bid/ask ticks that only update the size.

def reqTickByTickData(
            self, contract: Contract, tickType: str,
            numberOfTicks: int = 0, ignoreSize: bool = False) -> Ticker:
        """
        Subscribe to tick-by-tick data and return the Ticker that
        holds the ticks in ticker.tickByTicks.

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

        Args:
            contract: Contract of interest.
            tickType: One of  'Last', 'AllLast', 'BidAsk' or 'MidPoint'.
            numberOfTicks: Number of ticks or 0 for unlimited.
            ignoreSize: Ignore bid/ask ticks that only update the size.
        """
        reqId = self.client.getReqId()
        ticker = self.wrapper.startTicker(reqId, contract, tickType)
        self.client.reqTickByTickData(
            reqId, contract, tickType, numberOfTicks, ignoreSize)
        return ticker