Matching on custom types

const FieldError = ({ title }: FieldErrorProps) => {
  const field = useFieldContext();
  const errors = field.state.meta.errors.flatMap((error: unknown) => {
    const parser = match
      .case(type.instanceOf(ArkErrors), (e) =>
        e.flatMap((arkError) =>
          arkError.hasCode('intersection')
            ? arkError.errors.map((arkErrorError) => arkErrorError.message)
            : [arkError.message]
        )
      )
      .case(type.instanceOf(ArkError), (e) =>
        e.hasCode('intersection')
          ? e.errors.map((arkErrorError) => arkErrorError.message)
          : [e.message]
      )
      .case("Error", (e) => [e.message])
      .default((e) => [e?.toString() ?? 'Unknown error']);
    return parser(error);
  });
  return <ErrorAlert title={title} errors={errors} />;
};