System/Library/PrivateFrameworks/AccessibilityUIShared.framework
AXUIMessageContext.h
@class AXAccessQueue, NSObject;
@protocol OS_xpc_object;
@interface AXUIMessageContext : NSObject
@property (retain, nonatomic) NSObject<OS_xpc_object> *xpcMessage;
@property (nonatomic) void *context;
@property (retain, nonatomic) AXAccessQueue *targetAccessQueue;
@property (nonatomic) BOOL completionRequiresWritingBlock;
@property (copy, nonatomic) id /* block */ completion;
- (void).cxx_destruct;
@end