388      * @param string|Key|Key[] $publicKey The public key to use to authenticate the token
401     public function verifyIdToken($publicKey = null, $allowed_algs = array())  argument
408         $resp = $this->jwtDecode($idToken, $publicKey, $allowed_algs);
1446      * @param Key|Key[]|string|string[] $publicKey
1450     private function jwtDecode($idToken, $publicKey, $allowedAlgs)  argument
1452         $keys = $this->getFirebaseJwtKeys($publicKey, $allowedAlgs);
1469      * @param Key|Key[]|string|string[] $publicKey
1473     private function getFirebaseJwtKeys($publicKey, $allowedAlgs)  argument
1476         if ($publicKey instanceof Key) {
1477             return [$publicKey];
1483             foreach ((array) $publicKey as $kid => $pubKey) {
1512         if (is_array($publicKey)) {
1515             foreach ($publicKey as $kid => $pubKey) {
1525         return [new Key($publicKey, $allowedAlg)];