src/Viserio/Component/Routing/Route/Group.php
protected static function formatGroupSuffix(array $new, array $old): ?string
    {
        $oldSuffix = $old['suffix'] ?? null;

        if (isset($new['suffix'])) {
            return \trim($new['suffix']) . \trim($oldSuffix);
        }

        return $oldSuffix;
    }
protected static function formatGroupSuffix(array $new, array $old): ?string
    {
        $oldSuffix = $old['suffix'] ?? null;

        if (isset($new['suffix'])) {
            return \trim($new['suffix']) . \trim($oldSuffix);
        }

        return $oldSuffix;
    }
Format the suffix for the new group attributes.

@param array $new
@param array $old

@return null|string