code: @Override
      public void prepare(FeatureProvider provider)
      {
          super.prepare(provider);
  
          transformable = provider.getFeature(Transformable.class);
          transformable.addListener(this);
  
          if (provider instanceof CollidableListener)
          {
              addListener((CollidableListener) provider);
          }
      }
docs: /*
  Collidable