$searchTerms['color'] = "Red";
return $this->render('TestBundle::search.html.twig',
        array(
            "searchTerms" => $searchTerms));

<pre>
{% debug searchTerms %}
</pre>

{% debug searchTerms['color'] %}

ladybug_dump($searchTerms);

{{ searchTerms|ladybug_dump }}

ladybug_dump_die($searchTerms);

$this->get('ladybug')->log($searchTerms);