code: public void addMultiValuedField(String fieldName, List<String> values) {
  
          if ((values != null) && (values.size() > 0)) {
              for (String value : values) {
                  m_doc.addField(fieldName, value);
              }
          }
      }
docs: Adds a multi-valued field.<p>
  
  @param fieldName the field name to put the values in
  @param values the values to put in the field