public function __construct() {
			$this->id             = 'customer_invoice';
			$this->customer_email = true;
			$this->title          = __( 'Customer invoice / Order details', 'woocommerce' );
			$this->description    = __( 'Customer invoice emails can be sent to customers containing their order information and payment links.', 'woocommerce' );
			$this->template_html  = 'emails/customer-invoice.php';
			$this->template_plain = 'emails/plain/customer-invoice.php';
			$this->placeholders   = array(
				'{order_date}'   => '',
				'{order_number}' => '',
			);

			// Call parent constructor.
			parent::__construct();

			$this->manual = true;
		}