1 #import "OOPerformanceEventWatchProtocol.h"     2 #import "OOPerformanceEventMatcherProtocol.h"     9 @property (nonatomic, readonly) id<OOPerformanceEventMatcherProtocol> 
matcher;
    10 -(instancetype) init 
__attribute__((unavailable(
"init not available")));
    11 -(instancetype) initWithMatcher:(id<OOPerformanceEventMatcherProtocol>)
matcher;