 import Foundation
 import Photos
 
-@objc open class PHAssetHelper: NSObject
+@objc public class PHAssetHelper: NSObject
 {
     static let ErrorDomain = "PHAssetHelperErrorDomain"
     

        self.activeAssetRequests[phAsset.localIdentifier] = requestID
    }
    
    open func cancelRequests(_ cameraRollAsset: VIMPHAsset)
    {
        self.cancelImageRequest(cameraRollAsset: cameraRollAsset)
        self.cancelAssetRequest(cameraRollAsset: cameraRollAsset)

        self.activeAssetRequests.removeAll()
    }
    
    public func requestImage(cell: CameraRollAssetCell, cameraRollAsset: VIMPHAsset)
    {
        let phAsset = cameraRollAsset.phAsset
        let size = cell.bounds.size
