code: public void setZoomSliderVisible(boolean zoomSliderVisible)
      {
          boolean old = this.isZoomSliderVisible();
          this.zoomSliderVisible = zoomSliderVisible;
          zoomSlider.setVisible(zoomSliderVisible);
          firePropertyChange("zoomSliderVisible", old, this.isZoomSliderVisible());
      }
docs: Sets if the zoom slider should be visible
  @param zoomSliderVisible the new value of the zoomSliderVisible property