docs: public Entry updateMediaEntry(final String fileName, final String contentType, final InputStream is) throws Exception {
          synchronized (FileStore.getFileStore()) {
  
              final File tempFile = File.createTempFile(fileName, "tmp");
              final FileOutputStream fos = new FileOutputStream(tempFile);
              Utilities.copyInputToOutput(is, fos);
              fos.close();
  
              // Update media file
              final FileInputStream fis = new FileInputStream(tempFile);
              saveMediaFile(fileName, contentType, tempFile.length(), fis);
              fis.close();
              final File resourceFile = new File(getEntryMediaPath(fileName));
  
              // Load media-link entry to return
              final String entryPath = getEntryPath(fileName);
              final InputStream in = FileStore.getFileStore().getFileInputStream(entryPath);
              final Entry atomEntry = loadAtomResourceEntry(in, resourceFile);
  
              updateTimestamps(atomEntry);
              updateMediaEntryAppLinks(atomEntry, fileName, false);
  
              // Update feed with new entry
              final Feed f = getFeedDocument();
              updateFeedDocumentWithExistingEntry(f, atomEntry);
  
              // Save updated media-link entry
              final OutputStream os = FileStore.getFileStore().getFileOutputStream(entryPath);
              updateMediaEntryAppLinks(atomEntry, fileName, true);
              Atom10Generator.serializeEntry(atomEntry, new OutputStreamWriter(os, "UTF-8"));
              os.flush();
              os.close();
  
              return atomEntry;
          }
      }