Event.EventTouch has custom data or not?

I try to implement a button triggering a call to some function in a script.
I target some node, some component of the node, some function in the component, and from the name “CustomEventData” in the field avalailable in the button component, I guess I can pass some data.

myFunction(param) {
  console.log("param = " + param);
}

the console displays “param= [object EventTouch]”
I check http://cocos2d-x.org/docs/api-ref/creator/v1.3/classes/Event.EventTouch.html
and I can see no “customEventData” in this class…
So, how to use CustomEventData?

sorry found solution here: CustomEventData of Button