def csv_data
      case
      when google_key || url then Curl::Easy.perform(uri).body_str
      when file then File.open(uri).read
      end
    end
def csv_data
      case
      when google_key || url then Curl::Easy.perform(uri).body_str
      when file then File.open(uri).read
      end
    end
The csv_data for the table fu instance is loaded either from the remote source or from a local
 file, depending on the keys present in the yaml file.