logger.Info("IAM expired STS purge took %.2fs", took)
	}

	// Store the newly populated map in the iam cache. This takes care of
	// removing stale entries from the existing map.
	cache.iamSTSAccountsMap = stsAccountsFromStore

	stsAccPoliciesFromStore.Range(func(k string, v MappedPolicy) bool {
		cache.iamSTSPolicyMap.Store(k, v)
		return true
	})

	return nil
}

	var p MappedPolicy
	err := ies.loadIAMConfig(ctx, &p, getMappedPolicyPath(name, userType, isGroup))
	if err != nil {
		if err == errConfigNotFound {
			return errNoSuchPolicy
		}
		return err
	}
	m.Store(name, p)
	return nil
}

func getMappedPolicy(kv *mvccpb.KeyValue, m *xsync.MapOf[string, MappedPolicy], basePrefix string) error {
	var p MappedPolicy
	err := getIAMConfig(&p, kv.Value, string(kv.Key))

El parámetro de query `q` es del tipo `Union[str, None]` (o `str | None` en Python 3.10), lo que significa que es de tipo `str` pero también podría ser `None`, y de hecho, el valor por defecto es `None`, así que FastAPI sabrá que no es requerido.

/// note | Nota

FastAPI sabrá que el valor de `q` no es requerido por el valor por defecto `= None`.

			break
		}
	}
}

func (r *rebalanceMeta) load(ctx context.Context, store objectIO) error {
	return r.loadWithOpts(ctx, store, ObjectOptions{})
}

func (r *rebalanceMeta) loadWithOpts(ctx context.Context, store objectIO, opts ObjectOptions) error {
	data, _, err := readConfigWithMetadata(ctx, store, rebalMetaName, opts)
	if err != nil {
		return err
	}

	if len(data) == 0 {
		return nil

				hdr.Format = FormatUnknown // Numeric fields must end in NUL
			}
		case format.has(formatSTAR):
			star := tr.blk.toSTAR()
			prefix = p.parseString(star.prefix())
			hdr.AccessTime = time.Unix(p.parseNumeric(star.accessTime()), 0)
			hdr.ChangeTime = time.Unix(p.parseNumeric(star.changeTime()), 0)
		case format.has(FormatGNU):
			hdr.Format = format
			var p2 parser
			gnu := tr.blk.toGNU()

//// tab | Python 3.10+

```Python
q: str | None = None
```

////

//// tab | Python 3.8+

```Python
q: Union[str, None] = None
```

////

Тепер ми загорнемо її у `Annotated`, і отримаємо:

//// tab | Python 3.10+

```Python
q: Annotated[str | None] = None
```

////

//// tab | Python 3.8+

```Python
q: Annotated[Union[str, None]] = None
```

////

The query parameter `q` is of type `str | None`, that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

/// note

FastAPI will know that the value of `q` is not required because of the default value `= None`.

Having `str | None` will allow your editor to give you better support and detect errors.

///

     *
     * @throws CrawlerSystemException if the office manager fails to stop
     */
    @PreDestroy
    public void destroy() {
        try {
            officeManager.stop();
        } catch (final OfficeException e) {
            throw new CrawlerSystemException("Failed to stop officeManager.", e);
        }
    }

    /**

    }

    /**
     * Stops a running scheduled job.
     *
     * @param form the edit form containing the ID of the job to stop
     * @return HTML response redirecting to the list page after stopping
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse stop(final EditForm form) {
        verifyCrudMode(form.crudMode, CrudMode.DETAILS);
        final String id = form.id;

The fast food store has 8 processors (cashiers/cooks). While the concurrent burgers store might have had only 2 (one cashier and one cook).

But still, the final experience is not the best. 😞

---

This would be the parallel equivalent story for burgers. 🍔

For a more "real life" example of this, imagine a bank.