def save_extended_data_file
      extended = {
        Phonelib::Core::EXT_PREFIXES => @prefixes,
        Phonelib::Core::EXT_GEO_NAMES => @geo_names,
        Phonelib::Core::EXT_COUNTRY_NAMES => @countries,
        Phonelib::Core::EXT_TIMEZONES => @timezones,
        Phonelib::Core::EXT_CARRIERS => @carriers
      }
      File.open(file_path(Phonelib::Core::FILE_EXT_DATA), 'wb+') do |f|
        Marshal.dump(extended, f)
      end
      puts 'DATA SAVED'
    end
def save_extended_data_file
      extended = {
        Phonelib::Core::EXT_PREFIXES => @prefixes,
        Phonelib::Core::EXT_GEO_NAMES => @geo_names,
        Phonelib::Core::EXT_COUNTRY_NAMES => @countries,
        Phonelib::Core::EXT_TIMEZONES => @timezones,
        Phonelib::Core::EXT_CARRIERS => @carriers
      }
      File.open(file_path(Phonelib::Core::FILE_EXT_DATA), 'wb+') do |f|
        Marshal.dump(extended, f)
      end
      puts 'DATA SAVED'
    end
method saves extended data file