fun lookupImages() {
    viewModelScope.launch {
        val image1 = imageRepository.downloadImage("img-url-1")

        val image2 = imageRepository.downloadImage("img-url-2")

        _images.value = Pair(image1, image2)
    }
  }

  fun lookupImagesWithAsync() {
    viewModelScope.launch {
      val image1 = async { imageRepository.downloadImage("img-url-1") }

      val image2 = async { imageRepository.downloadImage("img-url-2") }

      _images.value = Pair(image1.await(), image2.await())
    }
  }