code: @Override
      public final NoteDocument findByRootAndString(
              final RootDocument rootDocument, final String string) {
          final NoteDocument noteDocument =
                  findByFileAndString(rootDocument.getFilename(), string);
          if (noteDocument == null) {
              return null;
          }
          final Note note = noteDocument.getGedObject();
          note.setParent(rootDocument.getGedObject());
          return noteDocument;
      }
docs: {@inheritDoc}