DoubleClickExchange extends Exchange { @Override public Object newNativeResponse() { return NetworkBid.BidResponse.newBuilder(); } private  DoubleClickExchange(); @Override Object newNativeResponse();  }
@Test public void test() { TestUtil.testCommonMethods(DoubleClickExchange.INSTANCE); assertTrue(DoubleClickExchange.INSTANCE.newNativeResponse() instanceof NetworkBid.BidResponse.Builder); }