/**
  * Returns the single instance of this class. 
  *
  * @return  Charitable_Recipient_Types
  * @access  public
  * @static
  * @since   1.0.0
  */
 public static function get_instance()
 {
     if (is_null(self::$instance)) {
         self::$instance = new Charitable_Recipient_Types();
     }
     return self::$instance;
 }
/**
 * Returns the registered recipient types.
 *
 * @return  array
 * @since   1.0.0
 */
function charitable_get_recipient_types()
{
    return Charitable_Recipient_Types::get_instance()->get_types();
}