function loadNextPropertiesAsync(oBundle) {
		if ( oBundle._aFallbackLocales.length ) {
			return tryToLoadNextProperties(oBundle, true).then(function(oProps) {
				// if props could not be loaded, try next fallback locale
				return oProps || loadNextPropertiesAsync(oBundle);
			});
		}
		// no more fallback locales: give up
		return Promise.resolve(null);
	}
Creates and returns a new instance with the exact same parameters this instance has been created with.

@private
@ui5-restricted sap.ui.model.resource.ResourceModel
@returns {module:sap/base/i18n/ResourceBundle|Promise<module:sap/base/i18n/ResourceBundle>}
    A new resource bundle or a Promise on that bundle (in asynchronous case)