* package.
   */
  public void testInstanceMethods(Object instance, Visibility minimalVisibility) {
    for (Method method : getInstanceMethodsToTest(instance.getClass(), minimalVisibility)) {
      testMethod(instance, method);
    }
  }

  ImmutableList<Method> getInstanceMethodsToTest(Class<?> c, Visibility minimalVisibility) {
    ImmutableList.Builder<Method> builder = ImmutableList.builder();

      }
    }
  }

  private boolean hasInstanceMethodToTestNulls(Class<?> c, Visibility visibility) {
    for (Method method : nullPointerTester.getInstanceMethodsToTest(c, visibility)) {
      for (Parameter param : Invokable.from(method).getParameters()) {
        if (!NullPointerTester.isPrimitiveOrNullable(param)) {
          return true;
        }
      }
    }

      }
    }
  }

  private boolean hasInstanceMethodToTestNulls(Class<?> c, Visibility visibility) {
    for (Method method : nullPointerTester.getInstanceMethodsToTest(c, visibility)) {
      for (Parameter param : Invokable.from(method).getParameters()) {
        if (!NullPointerTester.isPrimitiveOrNullable(param)) {
          return true;
        }
      }
    }