Trigger event on dismiss

[TiaanvdRiel]

Is there a way to trigger an event on modal dismiss?

I've tried disabling the swipe-down-to-dismiss functionality, adding a "close" button, and then triggering my event onTap of that button, and this works, but it is quite hacky, and swiping down to dismiss a modal is half the fun of using one in the first place, so it is not functionality that I want to lose.