@interface _TtCC15ConversationKit41ConversationControlsJoinCallCountdownView9RingLayer : CALayer {
    void /* unknown type, empty encoding */ lineWidth;
    void /* unknown type, empty encoding */ fillColor;
    void /* unknown type, empty encoding */ strokeColor;
}

@property (nonatomic) void /* unknown type, empty encoding */ percentage;

+ (BOOL)needsDisplayForKey:(id)a0;

- (id)init;
- (void)drawInContext:(struct CGContext { } *)a0;
- (void).cxx_destruct;
- (id)actionForKey:(id)a0;
- (id)initWithLayer:(id)a0;
- (id)initWithCoder:(id)a0;

@end