System/Library/Frameworks/Metal.framework
_MTLResource.h
@interface _MTLResource : _MTLObjectWithLabel
@property (readonly) unsigned long long allocationID;
@property (readonly) long long compressionType;
@property (readonly, nonatomic) unsigned long long compressionFootprint;
@property (readonly, nonatomic) unsigned long long colorSpaceConversionMatrix;
@property (readonly, nonatomic) unsigned long long accelerationStructureUniqueIdentifier;
@end