Using React-Native, I'm trying to capture swipe events on a list view item. Everything works well but i'm having difficulties acquiring the current coordinate of the touch gesture, relative to the list view item.

In my `_handlePanResponderMove`, I use the following snippet:

`let relativeY = event.nativeEvent.locationY;`

Unfortunately, the Y coordinate I'm getting is relative to the "child view" the swipe occurred on, and not relative to the list view item (as I was expecting, since I attached the PanResponder to the list view item)

How can I get the gestures' Y coordinate relative to the list view parent?