title: iOS google maps sdk GMSMarker positioning
body: <p>I am working with Google maps and I am able to center the map to the GMSMarker by using</p>
  
  <pre><code> GMSCameraPosition *camera =
      [[GMSCameraPosition alloc] initWithTarget:marker.position
                                           zoom:MAP_ZOOM_LEVEL
                                        bearing:0
                                   viewingAngle:0];
      [mapView animateToCameraPosition:camera];
  </code></pre>
  
  <p>I am showing a custom callout of size 200*150 and part of it gets hidden when the camera position is changed but I want the callout to be in the center and the map point to be below it. Any ideas how to do this.</p>