WritableResource

  
    interface WritableResource<T> extends Resource<T> {  readonly value: WritableSignal<T | undefined>;  hasValue(): boolean;  set(value: T | undefined): void;  update(updater: (value: T | undefined) => T | undefined): void;  asReadonly(): Resource<T>;  readonly override status: Signal<ResourceStatus>;  readonly override error: Signal<unknown>;  readonly override isLoading: Signal<boolean>;  override reload(): boolean;}