partial void DeleteProductImageThumbnail(ProductImageThumbnail instance);
 private void detach_ProductImageThumbnails(ProductImageThumbnail entity)
 {
     this.SendPropertyChanging();
     entity.Product = null;
 }
 partial void UpdateProductImageThumbnail(ProductImageThumbnail instance);
 partial void InsertProductImageThumbnail(ProductImageThumbnail instance);
 partial void DeleteProductImageThumbnail(ProductImageThumbnail instance);
 partial void UpdateProductImageThumbnail(ProductImageThumbnail instance);
 partial void InsertProductImageThumbnail(ProductImageThumbnail instance);
		private void detach_ProductImageThumbnails(ProductImageThumbnail entity)
		{
			this.SendPropertyChanging();
			entity.Product = null;
		}