code: public static final Renderer<Date> instance() { // NOPMD it's thread save!
      if (DateRenderer.instanceRenderer == null) {
        synchronized (DateRenderer.class) {
          if (DateRenderer.instanceRenderer == null) {
            DateRenderer.instanceRenderer = new DateRenderer("yyyy-MM-dd");
          }
        }
      }
      return DateRenderer.instanceRenderer;
    }
docs: returns the instance.
  
  @return Renderer