code: public CmsJspNavBuilder getNavigation() {
  
          if (isNotInitialized()) {
              return null;
          }
          if (m_vfsNav == null) {
              m_vfsNav = new CmsJspNavBuilder(getCmsObject());
          }
          return m_vfsNav;
      }
docs: Returns an initialized {@link CmsJspNavBuilder} instance.<p>
  
  @return an initialized navigation builder instance
  
  @see org.opencms.jsp.CmsJspNavBuilder