pakmanaged.js
function uniqSet(arr) {
    	var seen = new Set();
    	return arr.filter(function (el) {
    		if (!seen.has(el)) {
    			seen.add(el);
    			return true;
    		}
    	});
    }
function uniqSet(arr) {
    	var seen = new Set();
    	return arr.filter(function (el) {
    		if (!seen.has(el)) {
    			seen.add(el);
    			return true;
    		}
    	});
    }
2 - a simple Set type is defined