docs: public Feed getFeedDocument() throws AtomException {
          InputStream in = null;
          synchronized (FileStore.getFileStore()) {
              in = FileStore.getFileStore().getFileInputStream(getFeedPath());
              if (in == null) {
                  in = createDefaultFeedDocument(contextURI + servletPath + "/" + handle + "/" + collection);
              }
          }
          try {
              final WireFeedInput input = new WireFeedInput();
              final WireFeed wireFeed = input.build(new InputStreamReader(in, "UTF-8"));
              return (Feed) wireFeed;
          } catch (final Exception ex) {
              throw new AtomException(ex);
          }
      }