def put_item(omeka_item)
      self.put("items", omeka_item.data.id, omeka_item.data.to_h.to_json)
    end
def put_item(omeka_item)
      self.put("items", omeka_item.data.id, omeka_item.data.to_h.to_json)
    end
Update an item using an OmekaItem instance
 @param omeka_item [OmekaItem] An instance of OmekaItem
 @since 0.0.4