code: protected static boolean isNewerData(@Nonnull final Data older, @Nonnull final Data newer) {
  		return newer.getVersion().compareTo(older.getVersion()) > 0;
  	}
docs: Checks that {@code older} {@link Data} has a lower version number than the {@code newer} one.
  
  @param older
  possibly older {@code Data}
  @param newer
  possibly newer {@code Data}
  @return {@code true} if the {@code newer} Data is really newer, otherwise {@code false}