public static function send_transactional_email( $args = array() ) {
		try {
			$args = func_get_args();
			self::instance(); // Init self so emails exist.
			do_action_ref_array( current_filter() . '_notification', $args );
		} catch ( Exception $e ) {
			$error  = 'Transactional email triggered fatal error for callback ' . current_filter();
			$logger = wc_get_logger();
			$logger->critical(
				$error . PHP_EOL,
				array(
					'source' => 'transactional-emails',
				)
			);
			if ( Constants::is_true( 'WP_DEBUG' ) ) {
				trigger_error( $error, E_USER_WARNING ); // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped, WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
			}
		}
	}