@class NSLock, NSMapTable; @interface _MFMessageContentURLProtocolRegistry : NSObject { NSLock *_lock; } @property (readonly, nonatomic) NSMapTable *storage; + (id)sharedRegistry; - (id)init; - (void).cxx_destruct; - (id)URLForLoadingContext:(id)a0 scheme:(id)a1; - (id)loadingContextForURL:(id)a0; @end