title: How does drop pins with long press on google map with flutter?
body: <p>I'm new to flutter.
  I'm trying to drop pins on map with flutter,</p>
  
  <p>Here I got the current location with geolocator package and set a marker</p>
  
  <pre class="lang-dart prettyprint-override"><code>
   GoogleMap(
              onMapCreated: (controller){
                mapController=controller ;
              },
              mapType: _currentMapType,
              myLocationEnabled: true,
              initialCameraPosition: CameraPosition(
                target:_center,
                zoom: 11.0,
              ),
              markers: {
                //Marker for current Location
                Marker(
                  markerId: MarkerId("marker"),
                  position: LatLng(currentPosition.latitude, currentPosition.longitude),
                  infoWindow: InfoWindow(title: 'Current Location'),
                  icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueRed)
                )  
              },
            ),
  
  </code></pre>