'Gets the tracker information with the given tracker URL.
:param tracker_url: The given tracker URL.
:return: The tracker info dict if exists, None otherwise.'

@call_on_reactor_thread
def get_tracker_info(self, tracker_url):

    sanitized_tracker_url = get_uniformed_tracker_url(tracker_url)
    return self._tracker_dict.get(sanitized_tracker_url)
