_handleDebugParams(page) {
		if (!page) return;

		DebugUtil.setRequest(page.getRequest());

		const params = DebugUtil.getAllDebugValues();

		// Allow adjustment of log levels.
		_.forEach({
			_react_server_log_level       : 'main',
			_react_server_log_level_main  : 'main',
			_react_server_log_level_time  : 'time',
			_react_server_log_level_gauge : 'gauge',
		}, (type, param) => {
			if (params[param]) {
				logging.setLevel(type,  params[param]);
			}
		});
	}
type is one of
   History.events.PUSHSTATE: user clicked something to go forward but browser didn't do a
full page load
   History.events.POPSTATE: user clicked back button but browser didn't do a full page load
   History.events.PAGELOAD: full browser page load, not using History API.