Getting cached AUI instance to accomodate for cross-window retrieval

get_cached_aui_instance.js

var getCachedInstance = function(yuiInstance, o, args) {
		var instance = this;

		// Need the current window, not A.config.win
		var alloyInstance = yuiInstance._AUI_CACHED || ALLOY;

		if (o || instance instanceof AUI) {
			args = ALLOY.Array(args);

			args.unshift(ALLOY.config);

			var newInstance = yuiInstance.apply(null, args);

			AUI._uaExtensions(newInstance);
			AUI._miscExtensions(newInstance);
			AUI._guidExtensions(newInstance);

			var WIN = newInstance.config.win;

			if (!WIN.YUI) {
				WIN.YUI = yuiInstance;
			}

			if (!WIN.AUI) {
				var auiFunction = function(){
					console.log('new aui', WIN);
					return getCachedInstance.call(this, WIN.YUI, o, arguments);
				};

				WIN.YUI.AUI = auiFunction;
				WIN.AUI = auiFunction;

				WIN.YUI._AUI_CACHED = newInstance;
			}

			if (!WIN.Alloy) {
				WIN.Alloy = newInstance;
			}

			alloyInstance = newInstance;
		}

		return alloyInstance;
	};

	YUI.AUI = function(o) {
		return getCachedInstance.call(this, WIN.YUI, o, arguments);
	};