@Test
  public void testUnusualBuilderName() {
    ApkVersionCode apkVersionCode = new ApkVersionCode();
    ReleaseInfo x = ReleaseInfo.newBuilder().addApkVersionCode(apkVersionCode).build();
    assertThat(x.apkVersionCodes()).containsExactly(apkVersionCode);
  }
Notice that this is called ReleaseInfoBuilder and not Builder.
value/src/it/functional/src/test/java/com/google/auto/value/AutoValueTest.java