function _getDataFromLocalStorage() {
		if (!_isLocalStorageAvailable()) {
			return {}; // If no local storage is available, we simulate an empty one
		}

		var sServiceData = _getLocalStorage().get(_sStorageKey);
		if (!sServiceData) {
			return {}; // No data available => return empty map
		}

		return JSON.parse(sServiceData);
	}
Reads a map of all outdated services from local storage

@private
@return {map} Map of all outdated services (possibly empty)