def get_mods_item(mods_uuid)
      url = "#{@server_url}/items/mods/#{mods_uuid}.json"
      json = self.get_json(url)
      
      item = nil
      if json["nyplAPI"]["response"]["mods"]
        item = json["nyplAPI"]["response"]["mods"]
      end
      
      return item
    end
def get_mods_item(mods_uuid)
      url = "#{@server_url}/items/mods/#{mods_uuid}.json"
      json = self.get_json(url)
      
      item = nil
      if json["nyplAPI"]["response"]["mods"]
        item = json["nyplAPI"]["response"]["mods"]
      end
      
      return item
    end
get the item detail from a uuid