using afIoc::NotFoundErr** Contribute to set factory defaults values. Only BedSheet and 3rd Party libraries should set / ** contribute factory defaults. Web applications should override factory defaults by contributing** to `ApplicationDefaults`. ** ** @uses a MappedConfig of Str IDs to Objs. Config Obj values must be immutable.constclass FactoryDefaults {const Str:Obj? confignew make(Str:Obj? config){this.config = config.toImmutable}}