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<?php
declare(strict_types=1);
namespace MisterIcy\ExcelWriter\Handlers;
use MisterIcy\ExcelWriter\Generator\GeneratorInterface;
/**
* Class AbstractHandler
* @package MisterIcy\ExcelWriter\Handlers
*/
abstract class AbstractHandler implements HandlerInterface
{
* @var HandlerInterface
private $next;
* @param HandlerInterface $handler
* @return HandlerInterface
public function setNext(HandlerInterface $handler): HandlerInterface
$this->next = $handler;
return $this->next;
}
* @param GeneratorInterface $generator
* @return mixed|null
public function handle(GeneratorInterface $generator)
if (!is_null($this->next)) {
return $this->next->handle($generator);
return null;
MisterIcy /
excel-writer
