code: public static String[] stringValues2Array(final List<StringValue> _values)
      {
          final String[] ret;
          if (_values != null) {
              ret = new String[_values.size()];
              int i = 0;
              for (final StringValue value : _values) {
                  ret[i] = value.toString();
                  i++;
              }
          } else {
              ret = new String[0];
          }
          return ret;
      }
docs: Get an array for the StringValues.
  
  @param _values the values
  @return always StringArray, if parameter does not exist an empty
  StringArray