// a file.
      String visiblePackage = Reflection.getPackageName(cls);
      ImmutableList.Builder<Method> builder = ImmutableList.builder();
      for (Class<?> type : TypeToken.of(cls).getTypes().rawTypes()) {
        if (!Reflection.getPackageName(type).equals(visiblePackage)) {
          break;
        }
        for (Method method : type.getDeclaredMethods()) {

      this.declaringClass = declaringClass;
      this.factories = factories;
      this.factoryMethodsDescription = factoryMethodsDescription;
      packagesToTest.add(Reflection.getPackageName(declaringClass));
    }

    /**
     * Specifies that only the methods that are declared to return {@code returnType} or its subtype
     * are tested.
     *
     * @return this tester object
     */