code: public Map<String, Boolean> getIsParent() {
  
          if (m_isParent == null) {
              m_isParent = CmsCollectionsGenericWrapper.createLazyMap(new CmsIsParentTransformer());
          }
          return m_isParent;
      }
docs: Returns a lazy initialized Map that provides Booleans that
  indicate if the given navigation URI is a parent element of the current URI.<p>
  
  The provided Map key is assumed to be a String that represents an absolute VFS path.<p>
  
  Usage example on a JSP with the JSTL:<pre>
  &lt;cms:navigation  type="treeForFolder" startLevel="1" endLevel="3" var="nav" /&gt;
  &lt;c:forEach var="entry" items="${nav.items}" ... &gt;
  ...
  &lt;c:if test="${nav.isParent[entry.resourceName]}" &gt;
  The currently active navigation entry is a parent of the currently requested URI
  &lt;/c:if&gt;
  &lt;/c:forEach&gt;</pre>
  
  @return a lazy initialized Map that provides Booleans that
  indicate if the given navigation URI is a parent element of the current URI