Neo 3.5, Pivot Widget: Click event is not handling on x-axis or y-axis label of chart's type Combination (Column and line).

I am trying to make click event on x-axis label of combination chart in pivot widget. I played more to make its click event but its is not working. And I review on code so there is no features of click event for combinations chart pivot widget.

I have attached the screenshot. And also highlighted text where I have to add click event.