How to add and use the filters that are in the Demo? about brightroom HOT 4 CLOSED

extension ColorCubeStorage {
  static func loadToDefault() {
    
    do {
      
      try autoreleasepool {
        let bundle = Bundle.main
        let rootPath = bundle.bundlePath as NSString
        let fileList = try FileManager.default.contentsOfDirectory(atPath: rootPath as String)
        
        
        let filters = fileList
            .filter { ($0.hasSuffix(".png") || $0.hasSuffix(".PNG")) && $0.hasPrefix("Filter_")}
          .sorted()
          .concurrentMap { path -> FilterColorCube in
            let url = URL(fileURLWithPath: rootPath.appendingPathComponent(path))
            let data = try! Data(contentsOf: url)
            let image = UIImage(data: data)!
            let name = path
              .replacingOccurrences(of: "LUT_", with: "")
              .replacingOccurrences(of: ".png", with: "")
              .replacingOccurrences(of: ".PNG", with: "")
            return FilterColorCube.init(
              name: name,
              identifier: path,
              lutImage: image,
              dimension: 64
            )
        }
        
        self.default.filters = filters
        
      }
      
    } catch {
      
      assertionFailure("\(error)")
    }
  }
}



extension Collection where Index == Int {
  
  fileprivate func concurrentMap<U>(_ transform: (Element) -> U) -> [U] {
    var buffer = [U?].init(repeating: nil, count: count)
    let lock = NSLock()
    DispatchQueue.concurrentPerform(iterations: count) { i in
      let e = self[i]
      let r = transform(e)
      lock.lock()
      buffer[i] = r
      lock.unlock()
    }
    return buffer.compactMap { $0 }
  }
}

        let controller:PixelEditViewController = PixelEditViewController(image: image,colorCubeStorage: ColorCubeStorage.default)
        
        Router.shared.push(from: self, to: controller, animated: true)