class AbstractLayer {
  
  // Generic objects


  // Properties -----------------------------------------------------------------

  boolean visible;


  // Constructor ---------------------------------------------------------------- 

  AbstractLayer() {
    visible = true;
  }

 
  // Methods -------------------------------------------------------------------- 

  void draw() {
    // Draws
    if (visible) {
      innerDraw();
    }
  }
  
  void innerDraw() {
  }
 
}