The name &quot;closure&quot; is confusing since it&#x27;s actually Google&#x27;s Closure Compiler here and not the Clojure language <a href="https:&#x2F;&#x2F;developers.google.com&#x2F;closure&#x2F;compiler&#x2F;" rel="nofollow">https:&#x2F;&#x2F;developers.google.com&#x2F;closure&#x2F;compiler&#x2F;</a>