using concurrent::AtomicRef** (Service) - MetaData gleaned from startup, such as the initial 'AppModule'.constmixin BedSheetMetaData {** The pod that contains the initial 'AppModule'.abstract Pod? appPod()** The 'AppModule'.abstract Type? appModule()** The options BedSheet was started withabstract[Str:Obj] options()}internalconstclass BedSheetMetaDataImpl : BedSheetMetaData {overrideconst Pod? appPodoverrideconst Type? appModuleoverrideconst[Str:Obj] optionsinternalnew make(Pod? appPod, Type? appModule, [Str:Obj] options){this.appPod = appPodthis.appModule = appModulethis.options = options.toImmutable}}