throws  GroupNotFoundException
throws  ModelException
  private Set _findMembersOfMember()     throws  GroupNotFoundException  {    Set     hasMembers  = new LinkedHashSet();    // If member is a group, convert to group and find its members.    if (this.m.getSubjectTypeId().equals("group")) {      // Convert member back to a group      Group gAsM = this.m.toGroup();      // And attach root session for better looking up of memberships      gAsM.setSession(this.root);      // Find members of m       hasMembers = gAsM.getMemberships();    }    return hasMembers;  } // private Set _findMembersOfMember()