title: Pass trough all gestures between two widgets in Stack
body: <p>I'm working on an app where I display markers over a map like so:</p>
  <p><a href="https://i.stack.imgur.com/EO08Sm.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/EO08Sm.jpg" alt="enter image description here" /></a></p>
  <p>The way it works is markers are rendered &quot;over&quot; the Map widget as <code>Stack</code>. My problem is that currently, the markers 'absorbs' the gestures used to control the map underneath (if the gesture starts on the marker).</p>
  <p>I was therefore wondering, is there a way to pass through all gestures events between two widgets in a stack? Ideally, the marker would ignore (and pass through) all events except <code>onTap</code> (as I still want to be able to click on the markers).</p>
  <p>Here my specific tree:</p>
  <p><a href="https://i.stack.imgur.com/pfLed.png" rel="noreferrer"><img src="https://i.stack.imgur.com/pfLed.png" alt="enter image description here" /></a></p>
  <p>Cheers!</p>