code: function (keyOrList, func) {
  				var keys = toArray(keyOrList), i = -1, len = keys.length, key;
  				while (++i < len) {
  					key = keys[i];
  					func(key, me.get(key));
  				}
  				return me;
  			}
docs: Call `func` on each of the specified keys.  The key is provided as the first arg, and the value as the second.