protected function validate_coupon_excluded_product_categories( $coupon ) {
		if ( count( $coupon->get_excluded_product_categories() ) > 0 ) {
			$categories = array();

			foreach ( $this->get_items_to_validate() as $item ) {
				if ( ! $item->product ) {
					continue;
				}

				$product_cats = wc_get_product_cat_ids( $item->product->get_id() );

				if ( $item->product->get_parent_id() ) {
					$product_cats = array_merge( $product_cats, wc_get_product_cat_ids( $item->product->get_parent_id() ) );
				}

				$cat_id_list = array_intersect( $product_cats, $coupon->get_excluded_product_categories() );
				if ( count( $cat_id_list ) > 0 ) {
					foreach ( $cat_id_list as $cat_id ) {
						$cat          = get_term( $cat_id, 'product_cat' );
						$categories[] = $cat->name;
					}
				}
			}

			if ( ! empty( $categories ) ) {
				/* translators: %s: categories list */
				throw new Exception( sprintf( __( 'Sorry, this coupon is not applicable to the categories: %s.', 'woocommerce' ), implode( ', ', array_unique( $categories ) ) ), 114 );
			}
		}

		return true;
	}