code: function findViewSettingsItemByKey(vItemOrKey, aViewSettingsItems, sErrorMessage) {
  		var oItem;
  
  		// convenience, also allow strings
  		if (typeof vItemOrKey === "string") {
  			// find item with this key
  			oItem = getViewSettingsItemByKey(aViewSettingsItems, vItemOrKey);
  
  			if (!oItem) {
  				Log.error(sErrorMessage);
  			}
  		} else {
  			oItem = vItemOrKey;
  		}
  
  		return oItem;
  	}
docs: Finds an sap.m.ViewSettingsItem from a list of items by a given key.
  If it does not succeed logs an error.
  
  @param {sap.m.ViewSettingsItem|string} vItemOrKey The searched item or its key
  @param {array} aViewSettingsItems The list of sap.m.ViewSettingsItem objects to be searched
  @param {string} sErrorMessage The error message that will be logged if the item is not found
  @returns {*} The sap.m.ViewSettingsItem found in the list of items
  @private