System/Library/PrivateFrameworks/SiriStates.framework
SRSTCallServer.h
@class _SRSTCallServer, SRSTCallState;
@interface SRSTCallServer : NSObject
@property (readonly) _SRSTCallServer *underlyingObject;
@property (readonly, nonatomic) SRSTCallState *currentState;
- (id)init;
- (void).cxx_destruct;
@end