eZ\Publish\Core\FieldType\Relation\Type::getSortInfo PHP Method

For this FieldType, the related object's name is returned.

protected getSortInfo ( Value $value ) : mixed
$value	eZ\Publish\Core\FieldType\Value
return	mixed

    protected function getSortInfo(BaseValue $value)
    {
        return (string) $value;
    }

Type