public function __construct() {
			$this->id             = 'customer_note';
			$this->customer_email = true;
			$this->title          = __( 'Customer note', 'woocommerce' );
			$this->description    = __( 'Customer note emails are sent when you add a note to an order.', 'woocommerce' );
			$this->template_html  = 'emails/customer-note.php';
			$this->template_plain = 'emails/plain/customer-note.php';
			$this->placeholders   = array(
				'{order_date}'   => '',
				'{order_number}' => '',
			);

			// Triggers.
			add_action( 'woocommerce_new_customer_note_notification', array( $this, 'trigger' ) );

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