Error 

  Class "PayPal\Rest\ApiContext" not found

  at app\Http\Controllers\TransactionController.php:52
     48Γûò     private $_api_context;
     49Γûò     
     50Γûò     public function __construct(){
     51Γûò         $paypal_conf = \Config::get('paypal');
  Γ₧£  52Γûò         $this->_api_context = new ApiContext(new OAuthTokenCredential($paypal_conf['client_id'], $paypal_conf['secret']));
     53Γûò         $this->_api_context->setConfig($paypal_conf['settings']);
     54Γûò     }
     55Γûò 
     56Γûò     public function postPaymentWithpaypal(Request $request){

  1   [internal]:0
      App\Http\Controllers\TransactionController::__construct()

  2   vendor\laravel\framework\src\Illuminate\Container\Container.php:1211
      ReflectionClass::newInstanceArgs([])