Case1.swift

let imageDatas = try await withThrowingTaskGroup(of: Data.self, returning: [Data].self) { group in
  imageIdentifiers.forEach { imageIdentifier in
    group.addTask {
      return try await ImageProcessor.process(identifier: imageIdentifier)
    }
  }
  var results = [Data]()
  for try await imageData in group {
    results.append(imageData)
  }
  return results
}