validMaster.RegisterValidation<RsTransport>(p => p.USE_FLAG, new RequirementValidation());
var comboUSE_FLAG = RadComboBoxExtension.CreateRadComboBoxWithSourceBind<RsTransport, SystemStatus>(t => t.USE_FLAG, s => s.StatusName,
s => s.StatusID, StyleList.radComboBox, new SystemOption().GetYesOrNoOption, validMaster);
gridLayout.AddField<RsTransport>(p => p.USE_FLAG, "", StyleList.dataNullable, comboUSE_FLAG, "", 1, 1, validMaster);