private void setUpDefaultObjectToJsonTransformers() {
this.object_to_json_transformer = Transformer.newInstance().clear()
.with_default_transformer(new FieldBasedTransformer())
.and_b(new NullToJsonTransformer())
.and_b(new IgnoreClassTransformation())
.and_b(new LeafBooleanTransformer())
.and_b(new LeafCharacterTransformer())
.and_b(new LeafDateTransformer())
.and_b(new LeafJodaLocalDateTransformer())
.and_b(new LeafNumberTransformer())