function timezoneToOffset(timezone, fallback) {
  // Support: IE 9-11 only, Edge 13-15+
  // IE/Edge do not "understand" colon (`:`) in timezone
  timezone = timezone.replace(ALL_COLONS, '');
  var requestedTimezoneOffset = Date.parse('Jan 01, 1970 00:00:00 ' + timezone) / 60000;
  return isNumberNaN(requestedTimezoneOffset) ? fallback : requestedTimezoneOffset;
}
@ngdoc method
@name $cacheFactory#get

@description
Get access to a cache object by the `cacheId` used when it was created.

@param {string} cacheId Name or id of a cache to access.
@returns {object} Cache object identified by the cacheId or undefined if no such cache.