code: private Scene getScene(final StageWaveBean swb, final Region region) {
  
          Scene scene = swb.scene();
          if (scene == null) {
              scene = new Scene(region);
          } else {
              scene.setRoot(region);
          }
  
          return scene;
      }
docs: Gets the scene.
  
  @param swb the waveBean holding defaut values
  @param region the region
  
  @return the scene