title: Google docs java api entry.getContent() returns null on pdf file
body: <p>Trying to download docs from google docs and most of the files are ok, but on some pdf the entry.getContent() returns null.</p>
  
  <p>Don't see any explanation to that behavior, how can I get uri for doc download if getContent returns null ?</p>
  
  <p>Thank You and Best Regards. </p>