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app/Kernel/Object/Enum.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+use BackedEnum;
+
+class Enum
+{
+    /**
+     * Extract values from an array of BackedEnum instances.
+     *
+     * @param array<int,BackedEnum> $enums
+     *
+     * @return array<int,int|string|float>
+     */
+    public static function values(array $enums): array
+    {
+        return array_map(fn (BackedEnum $enum) => static::value($enum), $enums);
+    }
+
+    public static function value(BackedEnum $enum): int|string|float
+    {
+        return $enum->value;
+    }
+}

app/Kernel/Object/HasHiddenAttributes.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+trait HasHiddenAttributes
+{
+    public function isHidden(string $key): bool
+    {
+        if (property_exists($this, 'hidden') && is_array($this->hidden)) {
+            return in_array($key, $this->hidden, true);
+        }
+
+        return false;
+    }
+}

app/Kernel/Object/HasPermissions.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+interface HasPermissions
+{
+    public function permissions(): array;
+}

app/Kernel/Object/HasRoles.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+interface HasRoles
+{
+    public function roles(): array;
+}

app/Kernel/Object/HasRolesWithPermissions.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+interface HasRolesWithPermissions extends HasRoles, HasPermissions {}

app/Kernel/Object/HasUuidAsIdentifier.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+interface HasUuidAsIdentifier
+{
+    public function id(): string;
+}