static SerializeMemoize.Builder builder() {
      return new AutoValue_SerializableAutoValueExtensionTest_SerializeMemoize.Builder();
    }
Type that uses both {@code @SerializableAutoValue} and {@code @Memoized}, showing that the two
extensions work correctly together.
value/src/test/java/com/google/auto/value/extension/serializable/processor/SerializableAutoValueExtensionTest.java