title: How to attach source to Google Drive API or `Android Private Library` in Eclipse
body: <p>I've installed the <em>Drive API</em> using the <code>Add Google APIs...</code> menu option.<br/>
  When manually drilling into any one of the jars under <em>Drive API</em>, the source code opens ok.</p>
  
  <p>But manually drilling into the same jar under <code>Android Private Libraries</code> results in a "Source not found".</p>
  
  <p><img src="https://i.stack.imgur.com/f1X6X.png" alt="project view"></p>
  
  <p>So when using <code>open Declaration (F3)</code> for example, I get the "Source not found" page.</p>
  
  <p>The build system links all the jars using a library called <code>Android Private Libraries</code>.</p>
  
  <p>I could not find a way to attach source or documentation to the Drive API.</p>
  
  <p><img src="https://i.stack.imgur.com/qR3fE.png" alt="attach source dialog"></p>
  
  <p>All the options to attach anything are disabled.</p>
  
  <p>Any advice?</p>