code: function getLocaleEraNames(locale, width) {
      var /** @type {?} */ data = findLocaleData(locale);
      var /** @type {?} */ erasData = /** @type {?} */ (data[7 /* Eras */]);
      return getLastDefinedValue(erasData, width);
  }
docs: Eras for the Gregorian calendar (e.g. AD/BC).
  
  \@experimental i18n support is experimental.
  @param {?} locale
  @param {?} width
  @return {?}