docs: public HsqlArrayList listVisibleUsers(Session session) {
  
          HsqlArrayList list;
          User          user;
          boolean       isAdmin;
          String        sessionName;
          String        userName;
  
          list        = new HsqlArrayList();
          isAdmin     = session.isAdmin();
          sessionName = session.getUsername();
  
          if (userList == null || userList.size() == 0) {
              return list;
          }
  
          for (int i = 0; i < userList.size(); i++) {
              user = (User) userList.get(i);
  
              if (user == null) {
                  continue;
              }
  
              userName = user.getNameString();
  
              if (isAdmin) {
                  list.add(user);
              } else if (sessionName.equals(userName)) {
                  list.add(user);
              }
          }
  
          return list;
      }