How to get public key for phpseclib version 3 using public key loader?

Please check the difference between Phpseclib versions 2 and 3 for getting the public key.

For Phpseclib version 2:

<?php
use phpseclib\Crypt\RSA;
use Firebase\JWT\JWT;
use phpseclib\Math\BigInteger;

$rsa = new RSA();
$rsa->loadKey([
    'e' => new BigInteger(JWT::urlsafeB64Decode($e), 256),
    'n' => new BigInteger(JWT::urlsafeB64Decode($n),  256)
]);
echo $rsa->getPublicKey(); //get the Public Key
?>

<?php

use phpseclib\Crypt\RSA;

use Firebase\JWT\JWT;

use phpseclib\Math\BigInteger;

$rsa = new RSA();

$rsa->loadKey([

'e' => new BigInteger(JWT::urlsafeB64Decode($e), 256),

'n' => new BigInteger(JWT::urlsafeB64Decode($n), 256)

]);

echo $rsa->getPublicKey(); //get the Public Key

For Phpseclib version 3:

<?php
use phpseclib3\Crypt\RSA;
use phpseclib3\Crypt\PublicKeyLoader;
use phpseclib3\Math\BigInteger;
use Firebase\JWT\JWT;

$key = PublicKeyLoader::load([
    'e' => new BigInteger(JWT::urlsafeB64Decode($e), 256),
    'n' => new BigInteger(JWT::urlsafeB64Decode($n),  256)
]);

echo $key; //get the Public Key
?>

<?php

use phpseclib3\Crypt\RSA;

use phpseclib3\Crypt\PublicKeyLoader;

use phpseclib3\Math\BigInteger;

use Firebase\JWT\JWT;

$key = PublicKeyLoader::load([

'e' => new BigInteger(JWT::urlsafeB64Decode($e), 256),

'n' => new BigInteger(JWT::urlsafeB64Decode($n), 256)

]);

echo $key; //get the Public Key

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