title: What is codeStyleConfig xml file in codeStyles of idea folder?
body: <p>I updated my Android Studio as <code>3.1.2</code> and <code>codeStyleConfig</code> xml was created automatically in <code>.idea</code> folder like this.</p>
  
  <pre><code>&lt;component name="ProjectCodeStyleConfiguration"&gt;
    &lt;state&gt;
      &lt;option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" /&gt;
    &lt;/state&gt;
  &lt;/component&gt;
  </code></pre>
  
  <p>I'm wondering what <strong>PREFERRED_PROJECT_CODE_STYLE</strong> is and <strong>Default</strong> means. Is there anyone to know about this?</p>