public function no_stock( $product ) {
		if ( 'no' === get_option( 'woocommerce_notify_no_stock', 'yes' ) ) {
			return;
		}

		$subject = sprintf( '[%s] %s', $this->get_blogname(), __( 'Product out of stock', 'woocommerce' ) );
		/* translators: %s: product name */
		$message = sprintf( __( '%s is out of stock.', 'woocommerce' ), html_entity_decode( wp_strip_all_tags( $product->get_formatted_name() ), ENT_QUOTES, get_bloginfo( 'charset' ) ) );

		wp_mail(
			apply_filters( 'woocommerce_email_recipient_no_stock', get_option( 'woocommerce_stock_email_recipient' ), $product, null ),
			apply_filters( 'woocommerce_email_subject_no_stock', $subject, $product, null ),
			apply_filters( 'woocommerce_email_content_no_stock', $message, $product ),
			apply_filters( 'woocommerce_email_headers', '', 'no_stock', $product, null ),
			apply_filters( 'woocommerce_email_attachments', array(), 'no_stock', $product, null )
		);
	}