code: public void moveCameraToLastLocation(GoogleMap map, float zoom) {
          mProvider.getLastLocation().subscribe(location -> map.moveCamera(CameraUpdateFactory
                  .newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), zoom)));
      }
docs: Move and zoom to the most recently reported location.
  
  @see CameraUpdateFactory#newLatLngZoom(LatLng, float)