}

  public void testGet_nullConstantIgnored() {
    assertSame(FirstConstantIsNull.SECOND, ArbitraryInstances.get(FirstConstantIsNull.class));
  }

  public void testGet_constantWithGenericsNotUsed() {
    assertNull(ArbitraryInstances.get(WithGenericConstant.class));
  }

  public void testGet_nullConstant() {
    assertNull(ArbitraryInstances.get(WithNullConstant.class));
  }