$content );
	}

	private function get_container_class(): string {
		return self::NOTICE_CONTAINER_CLASS . ' ' . $this->session_variable_name;
	}

	private function get_fragments_id(): string {
		return 'div.' . str_replace( ' ', '.', $this->get_container_class() );
	}

	/**
	 * @return string
	 */
	private function get_notice_message( FreeShippingNoticeData $free_shipping_notice_data ): string {
		$amount = $free_shipping_notice_data->get_missing_amount();

		if ( $amount === 0.0 ) {
			return '';
		}

		return $this->prepare_notice_text( $free_shipping_notice_data );
	}

	/**
	 * @param FreeShippingNoticeData $free_shipping_notice_data .
	 *
	 * @return string
	 */
	private function prepare_notice_text( FreeShippingNoticeData $free_shipping_notice_data ): string {
		$notice_text = apply_filters( 'flexible-shipping/free-shipping/render-notice', $free_shipping_notice_data );

		/**
		 * Notice text for Free Shipping.
		 *
		 * @param string $notice_text Notice text.
		 * @param float  $amount      Amount left to free shipping.
		 *
		 * @return string Message text.
		 */
		$notice_text = apply_filters( 'flexible_shipping_free_shipping_notice_text', $notice_text, $free_shipping_notice_data->get_missing_amount() );

		return is_string( $notice_text ) ? $notice_text : '';
	}

}