public function send_mail( $mail_id, $arguments = [] ) {
		$mailers = WC()->mailer()->get_emails();
		foreach ( $mailers as $mailer ) {
			/* @var \WC_Email $mailer */
			if ( $mail_id == $mailer->id ) {
				if ( $arguments ) {
					call_user_func_array( [ $mailer, 'trigger' ], $arguments );
				} else {
					$mailer->trigger();
				}
			}
		}
	}