Inheritance: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteMeterMeterGroup(MeterMeterGroup instance);
 partial void UpdateMeterMeterGroup(MeterMeterGroup instance);
		private void detach_MeterMeterGroups(MeterMeterGroup entity)
		{
			this.SendPropertyChanging();
			entity.Meter = null;
		}
 partial void InsertMeterMeterGroup(MeterMeterGroup instance);
		private void attach_MeterMeterGroups(MeterMeterGroup entity)
		{
			this.SendPropertyChanging();
			entity.Meter = this;
		}