def add_file_callback(self, cls, callback):
        if self is None:
            for instance in cls.instances:
                instance.add_file_callback(callback)
            cls.global_file_callbacks.append(callback)
        else:
            self.file_callbacks.append(callback)
Equivalent of _trackPageview() in GA Javascript client.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Paste-2.0.1/paste/reloader.py/Monitor.add_file_callback--crossover with--dataset/ETHPy150Open kra3/py-ga-mob/pyga/requests.py/Tracker.track_pageview