code: @Override
      public int isSupportedOption(String option) {
          proc.debug(DBG_FMGR, "isSupportedOption: %s\n", option);
          return stdFileManager.isSupportedOption(option);
      }
docs: Determines if the given option is supported and if so, the
  number of arguments the option takes.
  
  @param option an option
  @return the number of arguments the given option takes or -1 if
  the option is not supported