import java.util.List; | |
import java.util.Optional; | |
import java.util.function.Function; | |
class Main { | |
{ | |
List<Optional<Function<String, String>>> list = asList(of(<error descr="T is not a functional interface">Main::identity</error>)); | |
} | |
static <T> List<T> asList(T a) { return null;} | |
static <T> List<T> asList(Optional a) { return null;} | |
static <T> Optional<T> of(T value) { return null;} | |
public static String identity(final String s) { | |
return s; | |
} | |
} |