@interface _TtCC8SPShared13WorkItemQueue8WorkItem : _TtCs12_SwiftObject {
void /* unknown type, empty encoding */ id;
void /* unknown type, empty encoding */ block;
void /* unknown type, empty encoding */ isCancelled;
void /* unknown type, empty encoding */ completion;
void /* unknown type, empty encoding */ completionAlreadyCalled;
void /* unknown type, empty encoding */ cancellationBlockNeeded;
void /* unknown type, empty encoding */ cancellationBlock;
void /* unknown type, empty encoding */ cancelContinuation;
}
@end