Twig_Environment::setExtensions PHP Method

    public function setExtensions(array $extensions)
    {
        foreach ($extensions as $extension) {
            $this->addExtension($extension);
        }
    }

 /**
  * Sets the templates path.
  *
  * @param  string            $path
  * @param  \Twig_Environment $twig
  * @param  array             $extensions
  * @return self
  */
 public function setTemplatePath($path, \Twig_Environment $twig = null, $extensions = [])
 {
     $this->paths['templates'] = $path;
     if (is_null($twig)) {
         $loader = new \Twig_Loader_Filesystem($path);
         $twig = new \Twig_Environment($loader);
     }
     $twig->setExtensions($extensions);
     $this->injector->share($twig);
     return $this;
 }