code: public boolean isHiddenNavigationEntry() {
  
          CmsClientProperty property = m_ownProperties.get(CmsClientProperty.PROPERTY_NAVINFO);
          return (property != null) && HIDDEN_NAVIGATION_ENTRY.equals(property.getEffectiveValue());
      }
docs: Returns if this is a hidden navigation entry.<p>
  
  @return <code>true</code> if this is a hidden navigation entry