OptimizerExtension example

 $options);

        $this->debug = (bool) $options['debug'];
        $this->setCharset($options['charset'] ?? 'UTF-8');
        $this->autoReload = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];
        $this->strictVariables = (bool) $options['strict_variables'];
        $this->setCache($options['cache']);
        $this->extensionSet = new ExtensionSet();

        $this->addExtension(new CoreExtension());
        $this->addExtension(new EscaperExtension($options['autoescape']));
        $this->addExtension(new OptimizerExtension($options['optimizations']));
    }

    /** * Enables debugging mode. */
    public function enableDebug()
    {
        $this->debug = true;
        $this->updateOptionsHash();
    }