public function read_children( &$product, $force_read = false ) {
		$children_transient_name = 'wc_product_children_' . $product->get_id();
		$children                = get_transient( $children_transient_name );

		if ( empty( $children ) || ! is_array( $children ) || ! isset( $children['all'] ) || ! isset( $children['visible'] ) || $force_read ) {
			$all_args = array(
				'post_parent' => $product->get_id(),
				'post_type'   => 'product_variation',
				'orderby'     => array(
					'menu_order' => 'ASC',
					'ID'         => 'ASC',
				),
				'fields'      => 'ids',
				'post_status' => array( 'publish', 'private' ),
				'numberposts' => -1, // phpcs:ignore WordPress.VIP.PostsPerPage.posts_per_page_numberposts
			);

			$visible_only_args                = $all_args;
			$visible_only_args['post_status'] = 'publish';

			if ( 'yes' === get_option( 'woocommerce_hide_out_of_stock_items' ) ) {
				$visible_only_args['tax_query'][] = array(
					'taxonomy' => 'product_visibility',
					'field'    => 'name',
					'terms'    => 'outofstock',
					'operator' => 'NOT IN',
				);
			}
			$children['all']     = get_posts( apply_filters( 'woocommerce_variable_children_args', $all_args, $product, false ) );
			$children['visible'] = get_posts( apply_filters( 'woocommerce_variable_children_args', $visible_only_args, $product, true ) );

			set_transient( $children_transient_name, $children, DAY_IN_SECONDS * 30 );
		}

		$children['all']     = wp_parse_id_list( (array) $children['all'] );
		$children['visible'] = wp_parse_id_list( (array) $children['visible'] );

		return $children;
	}