@Override
    protected boolean isImplicitObjectIdConversion() {
        // see https://github.com/mongodb/morphia/wiki/FrequentlyAskedQuestions
        return false;
    }
{@code MorphiaSerializer} extends {@link MongodbSerializer} with Morphia specific annotation handling

@author tiwe
querydsl-mongodb/src/main/java/com/querydsl/mongodb/morphia/MorphiaSerializer.java