What is CompositeDefinitionSource in Android Studio : <p>Recently after upgrading Gradle Android Studio automatically added this to my <code>.idea/gradle.xml</code> :</p>

<pre><code>    &lt;compositeConfiguration&gt;
      &lt;compositeBuild compositeDefinitionSource="SCRIPT" /&gt;
    &lt;/compositeConfiguration&gt;
</code></pre>

<p>What is the purpose of this change?</p>
