code: public LocalDocument getLocalDocument(final String docId) throws DocumentNotFoundException {
          Misc.checkState(this.isOpen(), "Database is closed");
          try {
              return get(queue.submit(new GetLocalDocumentCallable(docId)));
          } catch (ExecutionException e) {
              throw new DocumentNotFoundException(e);
          }
      }
docs: <p>Returns the current winning revision of a local document.</p>
  
  @param docId ID of the local document
  @return {@code LocalDocument} of the document
  @throws DocumentNotFoundException if the document ID doesn't exist