submitPig does not allow multiple argument via arg()

jobId = Job.submitPig(session) \
  .arg( "-p" ) \
  .arg( "someparam=somevalue" ) \
  .arg( "-v" ) \
...

    public Request arg( String arg ) {
      addParam( params, "arg", value );
      return this;
    }

    protected Callable<Response> callable() {
      return new Callable<Response>() {
        @Override
        public Response call() throws Exception {
          URIBuilder uri = uri( Job.SERVICE_PATH, "/pig" );
          List<NameValuePair> params = new ArrayList<NameValuePair>();
          addParam( params, "group", group );
          addParam( params, "file", file );
          addParam( params, "statusdir", statusDir );
          UrlEncodedFormEntity form = new UrlEncodedFormEntity( params );
          HttpPost request = new HttpPost( uri.build() );
          request.setEntity( form );
          return new Response( execute( request ) );
        }
      };
    }