public static < T1 , T2 > BiPredicate < T1 , T2 > spy1st ( BiPredicate < T1 , T2 > predicate , Box < T1 > param1 ) { return spy ( predicate , Box . < Boolean > empty ( ) , param1 , Box . < T2 > empty ( ) ) ; }
Proxies a binary predicate spying for first parameter