Access Jackson ObjectMapper in Lagom

Hi, a while back it wasn’t possible to access lagom object mapper.
https://groups.google.com/forum/#!topic/lagom-framework/2RCyJBh_NJk

Is it possible now ?

Using guice, doesn’t work.
@Inject public ElasticReadSide(final ObjectMapper objectMapper)

Is this safe to use ?
JacksonObjectMapperProvider.get(actorSystem).objectMapper();