     }
 
 
-    fileprivate var _progressionHandlers: [ProgressHandler] = []
-
-    open func appendProgressHandler(_ progressHandler: @escaping ProgressHandler) {
-        self._progressionHandlers.append(progressHandler)
+    fileprivate var _progressionHandlers: [ProgressionHandler] = []
+
+    open func appendProgressHandler(_ ProgressionHandler: @escaping ProgressionHandler) {
+        self._progressionHandlers.append(ProgressionHandler)
     }
 
     // Call all the progression handlers


     - returns: the instance
     */
    public convenience init(completionHandler: CompletionHandler?, progressionHandler: ProgressHandler?) {
        self.init(completionHandler:completionHandler)
        if let progressionHandler=progressionHandler {
            self._progressionHandlers.append(progressionHandler)

public typealias ComposedHandler = (_ progressionState: Progression?, _ completionState: Completion?)->()




// MARK: - Handlers
