Placeholder.php

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<?php

declare(strict_types=1);

namespace ILIAS\Mail\Placeholder;

use ILIAS\Mail\Signature\Signature;

interface Placeholder
{
    public function getId(): string;

    public function getLabel(): string;

    public function handle(Signature $signature): ?array;

    public function setNext(self $next): self;

    public function getNext(): ?self;
}