// Unfortunately this is pasted from ImmutableCollection.Builder.
    private static int expandedCapacity(int oldCapacity, int minCapacity) {
      if (minCapacity < 0) {
        throw new AssertionError("cannot store more than MAX_VALUE elements");
      }
      // careful of overflow!
      int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;
      if (newCapacity < minCapacity) {

```Python hl_lines="11  13-14"
{!> ../../docs_src/response_model/tutorial004.py!}
```

////

* `description: Union[str, None] = None` (or `str | None = None` in Python 3.10) has a default of `None`.
* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

but you might want to omit them from the result if they were not actually stored.

    // Unfortunately this is pasted from ImmutableCollection.Builder.
    private static int expandedCapacity(int oldCapacity, int minCapacity) {
      if (minCapacity < 0) {
        throw new AssertionError("cannot store more than MAX_VALUE elements");
      }
      // careful of overflow!
      int newCapacity = oldCapacity + (oldCapacity >> 1) + 1;
      if (newCapacity < minCapacity) {

	if r == nil || r.closer == nil {
		return nil
	}
	r.closer()
	r.closer = nil
	r.creator = nil
	return nil
}

// metacacheBlockWriter collects blocks and provides a callaback to store them.
type metacacheBlockWriter struct {
	wg           sync.WaitGroup
	streamErr    error
	blockEntries int
}

// newMetacacheBlockWriter provides a streaming block writer.

		}
	}
	b.err = io.ErrNoProgress
}

func (b *Reader) readErr() error {
	err := b.err
	b.err = nil
	return err
}

// Peek returns the next n bytes without advancing the reader. The bytes stop
// being valid at the next read call. If Peek returns fewer than n bytes, it
// also returns an error explaining why the read is short. The error is
// [ErrBufferFull] if n is larger than b's buffer size.
//

func newExpiryState(ctx context.Context, objAPI ObjectLayer, n int) *expiryState {
	es := &expiryState{
		ctx:    ctx,
		objAPI: objAPI,
	}
	workers := make([]chan expiryOp, 0, n)
	es.workers.Store(&workers)
	es.ResizeWorkers(n)
	return es
}

func (es *expiryState) getWorkerCh(h uint64) chan<- expiryOp {
	w := es.workers.Load()
	if w == nil || len(*w) == 0 {
		return nil
	}
	workers := *w

        }

        try {
            return getResponseData(uri, includeContent);
        } finally {
            if (accessTimeoutTarget != null) {
                accessTimeoutTarget.stop();
                if (!accessTimeoutTask.isCanceled()) {
                    accessTimeoutTask.cancel();
                }
            }
        }
    }

			if !v.hasEnded() {
				v.stop()
			}
		}
		globalAllHealState.Unlock()
	}

	// Init background heal state
	if globalBackgroundHealState == nil {
		globalBackgroundHealState = newHealState(GlobalContext, false)
	} else {
		globalBackgroundHealState.Lock()
		for _, v := range globalBackgroundHealState.healSeqMap {
			if !v.hasEnded() {
				v.stop()
			}
		}

        }
        generatorList.forEach(g -> {
            try {
                g.destroy();
            } catch (final Exception e) {
                logger.warn("Failed to stop thumbnail generator.", e);
            }
        });
    }

    public String getThumbnailPathOption() {
        return "-D" + Constants.FESS_THUMBNAIL_PATH + "=" + baseDir.getAbsolutePath();
    }

        }
    }

    private void forceStop() {
        systemHelper.setForceStop(true);
        for (final Crawler crawler : crawlerList) {
            crawler.stop();
        }
    }

    public long getExecuteTime() {
        return executeTime;
    }

    public List<String> getSessionIdList() {
        return sessionIdList;
    }