code: public IOSTouchAction doubleTap(PointOption doubleTapOption) {
          ActionParameter action = new ActionParameter("doubleTap",
                  doubleTapOption);
          parameterBuilder.add(action);
          return this;
      }
docs: Double taps using coordinates.
  
  @param doubleTapOption see {@link PointOption} and {@link ElementOption}..
  @return self-reference