System/Library/PrivateFrameworks/AXMediaUtilities.framework
AXMTask.h
@interface AXMTask : NSObject
@property (nonatomic, getter=isComplete) BOOL complete;
@property (copy, nonatomic) id /* block */ taskCompleteBlock;
- (void).cxx_destruct;
- (void)markAsComplete:(BOOL)a0;
@end