How to use "Diggin - Guzzle AutoCharsetEncoding plugin" with Behat MinkExtension

FeatureContext.php

use Behat\MinkExtension\Context\MinkContext;
use Diggin\Bridge\Guzzle\AutoCharsetEncodingPlugin\AutoCharsetEncodingPlugin;

class FeatureContext extends MinkContext
{
    /* ommitted */

    /**
     * @BeforeScenario
     */
    public function onBeforeScenario()
    {
        $autoCharsetEncodingPlugin = new AutoCharsetEncodingPlugin;
        $this->getSession()->getDriver()->getClient()->getClient()->getEventDispatcher()->addSubscriber($autoCharsetEncodingPlugin);
    }

    /* ommitted */
}