public/javascripts/yui/storage/storage.js
function(key) {
			this._keyMap[key] = this.length;
			this._keys.push(key);
			this.length = this._keys.length;
		}
function(key) {
			this._keyMap[key] = this.length;
			this._keys.push(key);
			this.length = this._keys.length;
		}
function ( key ) { this . _keyMap [ key ] = this . length ; this . _keys . push ( key ) ; this . length = this . _keys . length ; }
Adds the key to the set.
@method _addKey
@param key {String} Required. The key to evaluate.
@protected
Adds the key to the set .