def global_index_non_key_attributes(global_sec_index)
        attributes = {}
        if !global_sec_index["projection"]["non_key_attributes"].nil?
          hashcode = global_index_hashcode(global_sec_index)
          attributes = {"global_secondary_index.#{hashcode}.non_key_attributes.#" => global_sec_index["projection"]["non_key_attributes"].length.to_s}