title: How to detect google map animation finish?
body: <p>I am animating position change in google map with following code;</p>
  <p>The map is setup as;</p>
  <pre><code>GoogleMap(
        mapType: MapType.normal,
        initialCameraPosition: _cameraStartPos,
        onMapCreated: (GoogleMapController controller) {
          _mapController.complete(controller);
        },
      )
  </code></pre>
  <p>animation;</p>
  <pre><code>_cameraEndPlace = CameraPosition(target: widget.endPos, zoom: 8);
  
  final GoogleMapController controller = await _mapController.future;
  
  controller.animateCamera(CameraUpdate.newCameraPosition(_cameraEndPlace));
  </code></pre>
  <p>How do I detect when the animation is completed?</p>