Is it safe to use this function?

[laelbe]

Hello.

My App is using this javascript functions.

window.fn.pushPage = function (page, anim, clearcache = false) {
	document.getElementById('sidemenu').close();
	if (clearcache) {
		ons._internal.templateStore.set(page.id, null);
	}
	if (anim) {
		document.getElementById('appNavigator').pushPage(page.id, { data: { title: page.title }, animation: anim });
	} else {
		document.getElementById('appNavigator').pushPage(page.id, { data: { title: page.title } });
	}
};


window.fn.resetPageCache = function () {
	ons._internal.templateStore._storage = {};
}

Is it safe to use? Please advise me if there is another suitable method.
Thanks!