/**
* Fetches and displays the revisions feed for an entry.
*/
public void getRevisionFeed(String contentEntryId) throws IOException, ServiceException {
URL url = new URL(getRevisionFeedUrl() + contentEntryId);
RevisionFeed revisionFeed = service.getFeed(url, RevisionFeed.class);
for (BaseContentEntry<?> entry : revisionFeed.getEntries()) {
System.out.println(entry.getTitle().getPlainText());
System.out.println(" updated: " + entry.getUpdated().toUiString() + " by " +
entry.getAuthors().get(0).getEmail());
System.out.println(" revision #: " + entry.getRevision().getValue());
}