partial void DeleteGroupMember(GroupMember instance);
 partial void UpdateGroupMember(GroupMember instance);
		private void detach_GroupMembers(GroupMember entity)
		{
			this.SendPropertyChanging();
			entity.LoanGroup = null;
		}
 partial void InsertGroupMember(GroupMember instance);
		private void attach_GroupMembers(GroupMember entity)
		{
			this.SendPropertyChanging();
			entity.Member = this;
		}