code: private ObjectMapper getObjectMapper() {
  		ObjectMapper mapper = new ObjectMapper();
  		AnnotationIntrospector primary = new JacksonAnnotationIntrospector();
  		AnnotationIntrospector secondary = new JaxbAnnotationIntrospector();
  		AnnotationIntrospector pair = new AnnotationIntrospectorPair(primary, secondary);
  
  		mapper.setAnnotationIntrospector(pair);
  		mapper.setSerializationInclusion(Include.NON_NULL);
  
  		return mapper;
  	}
docs: Method to get the Jackson object mapper
  
  @return ObjectMapper the object mapper