code: public List<CmsJspResourceWrapper> getParentFolders() {
  
          if (m_parentFolders == null) {
              m_parentFolders = new ArrayList<CmsJspResourceWrapper>();
              CmsJspResourceWrapper parentFolder = getParentFolder();
              while (parentFolder != null) {
                  m_parentFolders.add(parentFolder);
                  parentFolder = parentFolder.getParentFolder();
              }
          }
          return m_parentFolders;
      }
docs: Returns all parent folder of this resource in the current site as a list.<p>
  
  First resource in the list will be the direct parent folder of this resource,
  the last element will be the site root folder.<p>
  
  @return all parent folder of this resource in the current site as a list