Assert.assertFalse(
          "No "
              + factoryMethodsDescription
              + " that return "
              + returnTypeToTest.getName()
              + " or subtype are found in "
              + declaringClass
              + ".",
          factoriesToTest.isEmpty());
      return factoriesToTest;
    }
  }

  private void testEqualsUsing(final Invokable<?, ?> factory)

      Assert.assertFalse(
          "No "
              + factoryMethodsDescription
              + " that return "
              + returnTypeToTest.getName()
              + " or subtype are found in "
              + declaringClass
              + ".",
          factoriesToTest.isEmpty());
      return factoriesToTest;
    }
  }

  private void testEqualsUsing(final Invokable<?, ?> factory)