@interface MTLCommandBufferDescriptor : NSObject <NSCopying>
@property (nonatomic) BOOL retainedReferences;
@property (nonatomic) unsigned long long errorOptions;
+ (id)allocWithZone:(struct _NSZone { } *)a0;
+ (id)alloc;
- (id)copyWithZone:(struct _NSZone { } *)a0;
@end