@class NSMutableArray; @interface VCDispatchQueue : NSObject { struct _opaque_pthread_mutex_t { long long __sig; char __opaque[56]; } _lock; NSMutableArray *_rootQueues; } + (id)defaultManager; - (id)init; - (void)dealloc; - (id)getCustomRootQueueWithPriority:(int)a0 isFixedPriority:(BOOL)a1; @end