private Object newKortti(double arvo) throws Throwable {
   Reflex.MethodRef1<Object, Object, Double> ctor =
       klass.constructor().taking(double.class).withNiceError();
   assertTrue(
       "Add class " + klassName + " constructor: public " + klassName + "(double initialBalance)",
       ctor.isPublic());
   return ctor.invoke(arvo);
 }
 @Points("77.1")
 @Test
 public void testConstructor() throws Throwable {
   Reflex.MethodRef1<Object, Object, Double> ctor =
       klass.constructor().taking(double.class).withNiceError();
   assertTrue(
       "Add class " + klassName + " constructor: public " + klassName + "(double initialBalance)",
       ctor.isPublic());
   ctor.invoke(4.0);
 }