Interface Function1<A,​R>

All Superinterfaces:
Function<A,​R>
All Known Subinterfaces:
Mapping<From,​To>, ThrowingFunction<A,​R>
All Known Implementing Classes:
ArrayMap, Mapping.EmptyMapping, MultiValuedKeyMap
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Function1<A,​R>
extends Function<A,​R>