partial void Deleteparticipant(participant instance);
 partial void Updateparticipant(participant instance);
 partial void Insertparticipant(participant instance);
		private void detach_participants(participant entity)
		{
			this.SendPropertyChanging();
			entity.interaction = null;
		}
		private void detach_participants(participant entity)
		{
			this.SendPropertyChanging();
			entity.sns_user = null;
		}
		private void detach_participants(participant entity)
		{
			this.SendPropertyChanging();
			entity.participant_type = null;
		}