public static IQueryable <Person> GetPeopleInLine(PersonService personService, Person currentPerson, RockContext rockContext, bool showAllIfStaff)
        {
            if (currentPerson == null)
            {
                return(new List <Person>().AsQueryable());
            }

            if (showAllIfStaff && CheckIsStaff(currentPerson, rockContext))
            {
                return(personService.Queryable());
            }
            else
            {
                var cellGroupsIdsInLine      = GetCellGroupIdsInLine(currentPerson, rockContext);
                var recordStatusIsActiveGuid = Rock.SystemGuid.DefinedValue.PERSON_RECORD_STATUS_ACTIVE.AsGuid();
                var peopleInLine             =
                    new GroupMemberService(rockContext).Queryable()
                    .Where(gm => cellGroupsIdsInLine.Contains(gm.GroupId) && gm.Person.RecordStatusValue.Guid == recordStatusIsActiveGuid)
                    .Select(gm => gm.Person);
                return(peopleInLine.Distinct());
            }
        }