code: private static void onEmbeddable(EntityType entityType, Attribute column, Object entity,
              EmbeddableType embeddableType, JsonObject jsonObject)
      {
          Object embeddedObject = PropertyAccessorHelper.getObject(entity, (Field) column.getJavaMember());
          String embeddedColumnName = ((AbstractAttribute) column).getJPAColumnName();
          Set<Attribute> embeddableAttributes = embeddableType.getAttributes();
          jsonObject.add(embeddedColumnName, getJsonObject(embeddableAttributes, embeddedObject));
      }
docs: On embeddable.
  
  @param entityType
  the entity type
  @param column
  the column
  @param entity
  the entity
  @param embeddableType
  the embeddable type
  @param jsonObject
  the json object