ViewModel.swift

@MainActor final class ViewModel: ObservableObject {
  private let imageLoader: ImageBatchLoader
  private let imageLoaderHandler: ImageBatchLoaderHandler
    
  init() {
    imageLoaderHandler = ImageBatchLoaderHandler()
    imageLoader = ImageBatchLoader(delegate: imageLoaderHandler)
    imageLoaderHandler.didLoadBatch = handleBatch
        
    imageLoader.start()
  }
    
  func handleBatch(_ batch: [UIImage]) {
    print("isMainThread", Thread.isMainThread, #function)
    // redacted
  }
}