docs: @SuppressWarnings("ReturnOfNull")
      public static Option strToOpt(final String optStr) {
          final String[] parts = SPACE.split(optStr, 2);
          final String name = parts[0];
          final String param = 1 < parts.length ? parts[1] : null;
  
          final Option opt = OPTS.get(name);
          return opt == null ? null : opt.newInstance(param);
      }