ClassLinker class uses "own" Lookup

 private static final MethodHandle FOR_CLASS = new Lookup(MethodHandles.lookup()).findStatic(StaticClass.class,
            "forClass", MethodType.methodType(StaticClass.class, Class.class));

to lookup public static method of public class StaticClass. This need not use specific lookup (MethodHandles.lookup()). Instead MethodHandles.publicLookup can be used.