src/sap.ui.core/src/sap/ui/core/LocaleData.js
function(sStyle, iWeekNumber) {
			assert(sStyle == "wide" || sStyle == "narrow" , "sStyle must be wide or narrow");

			var oMessageBundle = sap.ui.getCore().getLibraryResourceBundle("sap.ui.core", this.oLocale.toString()),
				sKey = "date.week.calendarweek." + sStyle;

			return oMessageBundle.getText(sKey, iWeekNumber);
		}
function(sStyle, iWeekNumber) {
			assert(sStyle == "wide" || sStyle == "narrow" , "sStyle must be wide or narrow");

			var oMessageBundle = sap.ui.getCore().getLibraryResourceBundle("sap.ui.core", this.oLocale.toString()),
				sKey = "date.week.calendarweek." + sStyle;

			return oMessageBundle.getText(sKey, iWeekNumber);
		}
function ( sStyle , iWeekNumber ) { assert ( sStyle == "wide" || sStyle == "narrow" , "sStyle must be wide or narrow" ) ; var oMessageBundle = sap . ui . getCore ( ) . getLibraryResourceBundle ( "sap.ui.core" , this . oLocale . toString ( ) ) , sKey = "date.week.calendarweek." + sStyle ; return oMessageBundle . getText ( sKey , iWeekNumber ) ; }
Returns the defined pattern for representing the calendar week number.

@param {string} sStyle the style of the pattern. It can only be either "wide" or "narrow".
@param {int} iWeekNumber the week number
@return {string} the week number string

@public
@since 1.32.0
Returns the defined pattern for representing the calendar week number .