Наследование: INotifyPropertyChanging, INotifyPropertyChanged
 partial void DeleteRelationship(Relationship instance);
 partial void UpdateRelationship(Relationship instance);
		private void detach_Relationships(Relationship entity)
		{
			this.SendPropertyChanging();
			entity.RelationshipType = null;
		}
 partial void InsertRelationship(Relationship instance);
		private void attach_Relationships(Relationship entity)
		{
			this.SendPropertyChanging();
			entity.Node = this;
		}