text: <?php
  
  namespace PhpParser\Node\Expr;
  
  use PhpParser\Node\Expr;
  
  class Isset_ extends Expr
  {
      /** @var Expr[] Variables */
      public $vars;
  
      /**
       * Constructs an array node.
       *
       * @param Expr[] $vars       Variables
       * @param array  $attributes Additional attributes
       */
      public function __construct(array $vars, array $attributes = array()) {
          parent::__construct($attributes);
          $this->vars = $vars;
      }
  
      public function getSubNodeNames() {
          return array('vars');
      }
  }
  