if (!$recipientInstance instanceof ManageableMember) {
// Invalid entry found!
throw new InvalidInterfaceException(array($this, 'ManageableMember'), self::EXCEPTION_REQUIRED_INTERFACE_MISSING);
if (!$recipientInstance instanceof ManageableMember) {
// Invalid entry found!
throw new InvalidInterfaceException(array($this, 'ManageableMember'), self::EXCEPTION_REQUIRED_INTERFACE_MISSING);