  var i:int = this._collection.indexOf(item);
            
            if (i == -1)
                return false;
            
            this._collection.splice(i, 1);
            
            return true;
        }
        
        /**
            Removes the element at the specified position in this list.
            
            @param index: The position of the item to removed.
            @return The item previously at the specified index.
        */
        public function removeItemAt(index:int):* 