vendor/omnipay/common/src/Omnipay/Common/GatewayFactory.php

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<?php
/**
 * Omnipay Gateway Factory class
 */

namespace Omnipay\Common;

use Guzzle\Http\ClientInterface;
use Omnipay\Common\Exception\RuntimeException;
use Symfony\Component\HttpFoundation\Request as HttpRequest;

/**
 * Omnipay Gateway Factory class
 *
 * This class abstracts a set of gateways that can be independently
 * registered, accessed, and used.
 *
 * Note that static calls to the Omnipay class are routed to this class by
 * the static call router (__callStatic) in Omnipay.
 *
 * Example:
 *
 * <code>
 *   // Create a gateway for the PayPal ExpressGateway
 *   // (routes to GatewayFactory::create)
 *   $gateway = Omnipay::create('ExpressGateway');
 * </code>
 *
 * @see Omnipay\Omnipay
 */
class GatewayFactory
{
    /**
     * Internal storage for all available gateways
     *
     * @var array
     */
    private $gateways = array();

    /**
     * All available gateways
     *
     * @return array An array of gateway names
     */
    public function all()
    {
        return $this->gateways;
    }

    /**
     * Replace the list of available gateways
     *
     * @param array $gateways An array of gateway names
     */
    public function replace(array $gateways)
    {
        $this->gateways = $gateways;
    }

    /**