Common/Model/Recipient.php
public static function getTypes()
    {
        return [
            self::TYPE_WEBSITE,
            self::TYPE_USER,
            self::TYPE_ADMINISTRATOR,
            self::TYPE_IN_CHARGE,
            self::TYPE_CUSTOMER,
            self::TYPE_SALESMAN,
            self::TYPE_ACCOUNTABLE,
            self::TYPE_SUPPLIER,
        ];
    }
public static function getTypes()
    {
        return [
            self::TYPE_WEBSITE,
            self::TYPE_USER,
            self::TYPE_ADMINISTRATOR,
            self::TYPE_IN_CHARGE,
            self::TYPE_CUSTOMER,
            self::TYPE_SALESMAN,
            self::TYPE_ACCOUNTABLE,
            self::TYPE_SUPPLIER,
        ];
    }
Returns the valid types.

@return array