Leaflet Rotate Only Shadow of an Icon

Question

I need a way to rotate only the shadow of the icon which is linked to my marker.

I'm using this plugin for rotation : https://github.com/hanying33/Leaflet.RotatedMarkerWithShadow

The example below rotate both shadow and icon :

var my_icon = L.icon({
            iconUrl: crisi_icon,                            
            iconSize: [34, 34],                                         
            iconAnchor: [17, 17],                                
            shadowUrl: path_azimuth,
            shadowSize:[34,34],
            shadowAnchor:[17,34],
          });

var my_marker = L.marker([feature.geometry.coordinates[1],feature.geometry.coordinates[0]],{
                icon: my_icon,
                rotationAngle: isNaN(feature.properties.Azimuth) ? 0 : feature.properties.Azimuth,
                rotationOrigin: mon_icon[1],
                rotationShadowOrigin:'center center',
                draggable:false,
            });

The result is like this :

But I need something like this :