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<?php
declare(strict_types = 1);
namespace Fixture\Innmind\Compose\Stack;
use Fixture\Innmind\Compose\Stack;
final class Middle implements Stack
{
private $stack;
public function __construct(Stack $stack)
$this->stack = $stack;
}
public function __invoke(): string
return sprintf(
'middle|%s|middle',
($this->stack)()
);