code: function getLocaleDayPeriods(locale, formStyle, width) {
      var /** @type {?} */ data = findLocaleData(locale);
      var /** @type {?} */ amPmData = /** @type {?} */ ([data[1 /* DayPeriodsFormat */], data[2 /* DayPeriodsStandalone */]]);
      var /** @type {?} */ amPm = getLastDefinedValue(amPmData, formStyle);
      return getLastDefinedValue(amPm, width);
  }
docs: Periods of the day (e.g. `[AM, PM]` for en-US).
  
  \@experimental i18n support is experimental.
  @param {?} locale
  @param {?} formStyle
  @param {?} width
  @return {?}