Source of CachedKeySet.php - Zabbix

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                // If the cached item is a string, the JWKS response was cached (previous behavior).
 
<?php
​
namespace Firebase\JWT;
​
use ArrayAccess;
use InvalidArgumentException;
use LogicException;
use OutOfBoundsException;
use Psr\Cache\CacheItemInterface;
use Psr\Cache\CacheItemPoolInterface;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Message\RequestFactoryInterface;
use RuntimeException;
use UnexpectedValueException;
​
/**
 * @implements ArrayAccess<string, Key>
 */
class CachedKeySet implements ArrayAccess
{
    /**
     * @var string
     */
    private $jwksUri;
    /**
     * @var ClientInterface
     */
    private $httpClient;
    /**
     * @var RequestFactoryInterface
     */
    private $httpFactory;
    /**
     * @var CacheItemPoolInterface
     */
    private $cache;
    /**
     * @var ?int
     */
    private $expiresAfter;
    /**
     * @var ?CacheItemInterface
     */
    private $cacheItem;
    /**
     * @var array<string, array<mixed>>
     */
    private $keySet;
    /**
     * @var string
     */
    private $cacheKey;
    /**
     * @var string
     */
    private $cacheKeyPrefix = 'jwks';
    /**
     * @var int
     */
    private $maxKeyLength = 64;
    /**
     * @var bool
     */
    private $rateLimit;
    /**
     * @var string
     */
    private $rateLimitCacheKey;
    /**
     * @var int
     */
    private $maxCallsPerMinute = 10;
    /**
     * @var string|null
     */
    private $defaultAlg;
​
    public function __construct(
        string $jwksUri,
        ClientInterface $httpClient,
        RequestFactoryInterface $httpFactory,
        CacheItemPoolInterface $cache,
        ?int $expiresAfter = null,
        bool $rateLimit = false,
        ?string $defaultAlg = null
    ) {
        $this->jwksUri = $jwksUri;
        $this->httpClient = $httpClient;
        $this->httpFactory = $httpFactory;
        $this->cache = $cache;
        $this->expiresAfter = $expiresAfter;