code: public static Range fromString(String value) {
          if (value == null || value.isEmpty())
              return null;
          JsArrayNumber array = JsonUtils.safeEval(value);
          return new Range(array);
      }
docs: Converts the given string to a range instance.<br>
  <br>
  Useful when using UiBinder.
  
  @param value
  @return