code: protected void setPreviewVisible(boolean visible) {
  
          if (visible) {
              addStyleName(I_CmsLayoutBundle.INSTANCE.locationPickerCss().hasPreview());
          } else {
              removeStyleName(I_CmsLayoutBundle.INSTANCE.locationPickerCss().hasPreview());
          }
      }
docs: Sets the preview visible.<p>
  
  @param visible <code>true</code> to set the preview visible