How to disable Firebase/Core debug messages in iOS : <p>I get several debug messages from Firebase - quite chatty:</p>

<pre><code>2016-10-20 22:18:33.576 Sitch[1190] &lt;Debug&gt; [Firebase/Core][I-COR000019] Clearcut post completed
</code></pre>

<p>I don't see any way to quiet them. FIRAnalytics only shows INFO and more severe but Firebase/Core seems to have debug enabled by default?</p>

<p>This is the cocoapods build - from podfile.lock:</p>

<pre><code>FirebaseCore (3.4.3):
    GoogleInterchangeUtilities (~&gt; 1.2)
    GoogleUtilities (~&gt; 1.2)
</code></pre>
