/**
 * Get menu item by id
 *
 * @param   integer  $id  The item id
 *
 * @return  MenuItem|null  The item object if the ID exists or null if not found
 *
 * @since   1.5
 */
public function getItem($id)
{
    $result = null;
    if (isset($this->getMenu()[$id])) {
        $result =& $this->getMenu()[$id];
    }
    return $result;
}