code: String getMembershipTypeNodePath(String name) throws RepositoryException
     {
        return service.getStoragePath()
           + "/"
           + JCROrganizationServiceImpl.STORAGE_JOS_MEMBERSHIP_TYPES
           + "/"
           + (name.equals(MembershipTypeHandler.ANY_MEMBERSHIP_TYPE)
              ? JCROrganizationServiceImpl.JOS_MEMBERSHIP_TYPE_ANY : name);
     }
docs: Returns the path where defined membership type is stored.