`java.lang.invoke.MethodHandles.Lookup::unreflectSetter` returns a `MethodHandle` giving write access to the given `Field` object. A `Field` object for a static final field does not have write access even if its accessible flag is true (i.e. `Field.setAccessibe(true)` has been called). In JDK 13, `Lookup::unreflectSetter` is fixed to throw `IllegalAccessException` if the given `Field` object is a static final field.