class java/util/function/Function
andThen
 <V:Ljava/lang/Object;>(Ljava/util/function/Function<-TR;+TV;>;)Ljava/util/function/Function<TT;TV;>;
 <V:Ljava/lang/Object;>(L1java/util/function/Function<-TR;+TV;>;)L1java/util/function/Function<TT;TV;>;
apply
 (TT;)TR;
 (TT;)TR;
compose
 <V:Ljava/lang/Object;>(Ljava/util/function/Function<-TV;+TT;>;)Ljava/util/function/Function<TV;TR;>;
 <V:Ljava/lang/Object;>(L1java/util/function/Function<-TV;+TT;>;)L1java/util/function/Function<TV;TR;>;
identity
 <T:Ljava/lang/Object;>()Ljava/util/function/Function<TT;TT;>;
 <T:Ljava/lang/Object;>()L1java/util/function/Function<TT;TT;>;