def stop(cls, name):
        """
        stops the timer with a given name.

        :param name: the name of the timer
        :type name: string
        """
        cls.timer_end[name] = time.time()
        if cls.debug:
            print("Timer", name, "stopped ...")
stops the timer with a given name.

        :param name: the name of the timer
        :type name: string