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<?php
declare(strict_types=1);
use Nette\Utils\Iterables;
use Tester\Assert;
require __DIR__ . '/../bootstrap.php';
Assert::false(Iterables::containsKey(new ArrayIterator([]), 'a'));
Assert::true(Iterables::containsKey(new ArrayIterator(['a']), 0));
Assert::true(Iterables::containsKey(new ArrayIterator(['x' => 1, 'y' => 2, 'z' => 3]), 'y'));
Assert::false(Iterables::containsKey(new ArrayIterator(['x' => 1, 'y' => 2, 'z' => 3]), ''));
Assert::false(Iterables::containsKey(new ArrayIterator([1, 2, 3]), '1'));
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