code: CmsTreeOpenState getSitemapTreeState(String treeToken) {
  
          return (CmsTreeOpenState)(getRequest().getSession().getAttribute(
              getTreeOpenStateAttributeName(I_CmsGalleryProviderConstants.TREE_SITEMAP, treeToken)));
      }
docs: Gets the sitemap tree open state.<p>
  
  @param treeToken the tree token to use
  
  @return the sitemap tree open state