title: Meaning of { *; } in ProGuard
body: <p>Consider this proguard statement :</p>
  
  <pre><code>-keep public class * extends android.support.design.widget.CoordinatorLayout$Behavior { *; }
  </code></pre>
  
  <p>In this statement what does the addition of { *; } mean?</p>
  
  <p>Does it preserve all methods? All fields? Or just the entire class?</p>