def get_image_id(bibl_uuid, mods_uuid)
      url = "#{@server_url}/items/#{bibl_uuid}.json?per_page=500"
      json = self.get_json(url)
      image_id = nil
      
      json["nyplAPI"]["response"]["capture"].each do | capture|
      if capture["uuid"] == mods_uuid
        image_id = capture["imageID"]
        break
      end #if
      end if json["nyplAPI"]["response"]["numResults"].to_i > 0

      return image_id
    end
def get_image_id(bibl_uuid, mods_uuid)
      url = "#{@server_url}/items/#{bibl_uuid}.json?per_page=500"
      json = self.get_json(url)
      image_id = nil
      
      json["nyplAPI"]["response"]["capture"].each do | capture|
      if capture["uuid"] == mods_uuid
        image_id = capture["imageID"]
        break
      end #if
      end if json["nyplAPI"]["response"]["numResults"].to_i > 0

      return image_id
    end
gets the image id for an item based on the the bibliographic uuid (container uuid) and the mods uuid (the actual item)