code: public static final Renderer<Integer> instance() { // NOPMD it's thread save!
      if (IntegerRendererWithoutSeparator.instanceRenderer == null) {
        synchronized (IntegerRendererWithoutSeparator.class) {
          if (IntegerRendererWithoutSeparator.instanceRenderer == null) {
            IntegerRendererWithoutSeparator.instanceRenderer = new IntegerRendererWithoutSeparator();
          }
        }
      }
      return IntegerRendererWithoutSeparator.instanceRenderer;
    }
docs: returns the instance.
  
  @return CurrencyDoubleRenderer