code: @Override
      public Map<String, String> getArgumentsAsMap() {
          Map<String, String> variables = new VariableFromCsvFileReader(getFileName()).getDataAsMap(getVariablePrefix(), getSeparator(), getSkipLines());
          //store in System Properties also
          if (isStoreAsSystemProperty()) {
              for (Map.Entry<String, String> element : variables.entrySet()) {
                  String variable = element.getKey();
                  if (System.getProperty(variable) == null) {
                      System.setProperty(variable, element.getValue());
                  }
              }
          }
  
          return variables;
      }
docs: https://groups.google.com/forum/#!topic/jmeter-plugins/gWn7MTgvTfE method