How to use the core.addChild function in core

$.terms.addEventListener("click", function(_event) {
	APP.log("debug", "settings @terms");

	APP.addChild("settings_legal", {
		title: "Terms of Service",
		url: APP.LEGAL.TOS
	}, true);
});

down: function(_event) {
			APP.log("debug", "event_event @next");

			APP.addChild("event_event", {
				id: ACTION.next.id,
				index: CONFIG.index
			}, false, true);
		},
		up: function(_event) {

down: function(_event) {
			APP.log("debug", "facebook_article @next");

			APP.addChild("facebook_article", {
				id: ACTION.next.id,
				index: CONFIG.index
			}, false, true);
		},
		up: function(_event) {

$.handlePrevious = function(_event) {
	APP.log("debug", "podcast_podcast @previous");

	if(ACTION.previous) {
		$.streamStop();

		APP.addChild("podcast_podcast", {
			id: ACTION.previous.id,
			index: CONFIG.index
		}, false, true);
	}
};

$.container.addEventListener("click", function(_event) {
	APP.addChild(_event.row.rowData.type, _event.row.rowData);
});