Casting types in pipeline without re-mapping

cause.pipe(
    Cause.failures, // => AppError | ValidationError | OtherError
    Chunk.filter((e) => e instanceof ValidationError),
    Chunk.map((e) => e as ValidationError) // or maybe Chunk.cast<ValidationError>,
    Chunk.map((e) => e.errors),
    Chunk.toReadonlyArray
)