code: private ProxyDestroyParams getProxyDestroyParamsFromCommandLine(
      CommandLine commandLine) {
  
      ProxyDestroyParams params = new ProxyDestroyParams();
  
      if (commandLineHasOption(ProxyDestroyOptions.DRY)) {
        params.setDryRun(true);
      }
  
      if (commandLineHasOption(ProxyDestroyOptions.FILE)) {
        params.setProxyFile(getOptionValue(ProxyDestroyOptions.FILE));
      }
  
      return params;
    }
docs: Get option values from a {@link CommandLine} object to build a
  {@link ProxyDestroyParams} object containing the parameters for
  voms-proxy-destroy.
  
  @param commandLine
  @return the parameters for the {@link VomsProxyDestroy} command