code: public void createSubEntry(final CmsClientSitemapEntry newEntry, CmsUUID parentId, CmsUUID structureId) {
  
          if (structureId == null) {
              structureId = m_data.getDefaultNewElementInfo().getCopyResourceId();
          }
          create(newEntry, parentId, m_data.getDefaultNewElementInfo().getId(), structureId, null, false);
      }
docs: Registers a new sitemap entry.<p>
  
  @param newEntry the new entry
  @param parentId the parent entry id
  @param structureId the structure id of the model page (if null, uses default model page)