private static IEnumerable <EnumMember <EnumValues> > Filter(string flag) => RegionEnumHelper.Filter(InternalEnumMembersCache, flag);
 /// <summary>
 /// Get Cosmos Region Enum value / CEP-1 from the given code value.
 /// </summary>
 /// <param name="value"></param>
 /// <returns></returns>
 public static RegionEnumValue GetRegionEnumValue(this RegionCodeValue value)
 {
     return(RegionEnumHelper.Value(value, InternalCrCodeMappingCache));
 }