Rock.CheckIn.CheckInPerson.ContainsKey C# (CSharp) Метод

        public bool ContainsKey( object key )
        {
            var additionalKeys = new List<string> { "FamilyMember", "LastCheckIn", "FirstTime", "SecurityCode", "GroupTypes" };
            if ( additionalKeys.Contains( key.ToStringSafe() ) )
            {
                return true;
            }
            else
            {
                return Person.ContainsKey( key );
            }
        }