# CompletionObserver

```typescript
interface CompletionObserver<T> {
  closed?: boolean;
  next?: (value: T) => void;
  error?: (err: any) => void;
  complete: () => void;
}
```

## Propiedades

| Propiedad | Tipo                 | Descripción |
| --------- | -------------------- | ----------- |
| closed    | `boolean`            |             |
| next      | `(value: T) => void` |             |
| error     | `(err: any) => void` |             |
| complete  | `() => void`         |             |