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;
}