title: What is CompositeDefinitionSource in Android Studio
body: <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>