public static Extension AddStateAsExtension(this IExtendable extendable, ThingState state)
 {
     return(extendable.AddStringAsExtension(HealthVaultExtensions.StateFhirExtensionName, state.ToString()));
 }
 public static Extension AddFlagsAsExtension(this IExtendable extendable, ThingFlags flags)
 {
     return(extendable.AddStringAsExtension(HealthVaultExtensions.FlagsFhirExtensionName, flags.ToString()));
 }