static addCalendarWeekTexts(oResult, sUI5Tag) {
		const oResourceBundle = Generator.getResourceBundle(sUI5Tag);

		oResult["sap-calendarWeek"] = {
			"narrow" : oResourceBundle?.["calendarweek.narrow"]?.text,
			"wide" : oResourceBundle?.["calendarweek.wide"]?.text
		};
		if (!oResult["sap-calendarWeek"].narrow || !oResult["sap-calendarWeek"].wide) {
			throw new Error("Missing calendar week texts for " + sUI5Tag);
		}
	}
Adds "sap-calendarWeek" text from i18n resource bundle to the given result object for the given language tag.

@param {object} oResult
  The object of the generator's result into which the translated text is written
@param {string} sUI5Tag
  The UI5 language tag, e.g. "en", "de_CH", "zh_CN" or "sr_Latn"
@throws {Error}
  If the calendar week texts are missing in the i18n resource bundle