code: func AddSaveable(name string, saveable Saveable) Option {
  	return (Option)(func(m StateManager) {
  		manager, ok := m.(*basicStateManager)
  		if !ok {
  			log.Crit("Unable to add to state manager; unknown instantiation")
  			return
  		}
  		manager.state.Data[name] = &saveable
  	})
  }
docs: // AddSaveable is an option that adds a given saveable as one that should be saved
  // under the given name. The name must be the same across uses of the
  // statemanager (e.g. program invocations) for it to be serialized and
  // deserialized correctly.