Symfony\Component\Templating\PhpEngine::setHelpers PHP Method

    public function setHelpers(array $helpers)
    {
        $this->helpers = array();
        $this->addHelpers($helpers);
    }

 protected function getExtensions()
 {
     // should be moved to the Form component once absolute file paths are supported
     // by the default name parser in the Templating component
     $reflClass = new \ReflectionClass('Symfony\\Bundle\\FrameworkBundle\\FrameworkBundle');
     $root = realpath(dirname($reflClass->getFileName()) . '/Resources/views');
     $rootTheme = realpath(__DIR__ . '/Resources');
     $templateNameParser = new StubTemplateNameParser($root, $rootTheme);
     $loader = new FilesystemLoader(array());
     $this->engine = new PhpEngine($templateNameParser, $loader);
     $this->engine->addGlobal('global', '');
     $this->engine->setHelpers(array(new TranslatorHelper(new StubTranslator())));
     return array_merge(parent::getExtensions(), array(new TemplatingExtension($this->engine, $this->csrfTokenManager, array('FrameworkBundle:Form'))));
 }