// "Replace nested function call with andThen call" "true" import java.util.function.BinaryOperator; import java.util.function.Function; import java.util.function.UnaryOperator; public class Main { private void testFn() { Function<String, Integer> lookup = Integer::parseInt; UnaryOperator<String> selector = String::trim; BinaryOperator<Integer> min = Math::min; String foo = "xyz"; Integer integer = selector.andThen(lookup).apply(" " + foo); } }