@SuppressWarnings("unchecked")
    private <T extends Mesh> T getMesh(String suffix) {
        Geometry child = (Geometry)getChild(getGeometryName(suffix));
        if(child != null) {
            return (T) child.getMesh();
        }

        return null;
    }
@return the dotted line between bones (can be null)
jme3-core/src/main/java/com/jme3/scene/debug/SkeletonDebugger.java