public static RepositoryPolicy toRepositoryPolicy(org.apache.maven.model.RepositoryPolicy policy) {
        boolean enabled = true;
        String checksums = toRepositoryChecksumPolicy(RepositoryPolicy.CHECKSUM_POLICY_WARN); // the default
        String updates = RepositoryPolicy.UPDATE_POLICY_DAILY;

        if (policy != null) {
            enabled = policy.isEnabled();
            if (policy.getUpdatePolicy() != null) {

  // VolumeClaimTemplates when the StatefulSet is deleted. The default policy
  // of `Retain` causes PVCs to not be affected by StatefulSet deletion. The
  // `Delete` policy causes those PVCs to be deleted.
  optional string whenDeleted = 1;

  // whenScaled specifies what happens to PVCs created from StatefulSet
  // VolumeClaimTemplates when the StatefulSet is scaled down. The default

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: quay.io/minio/minio tag: RELEASE.2021-10-10T16-53-30Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2021-10-07T04-19-58Z...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: quay.io/minio/minio tag: RELEASE.2021-11-24T23-19-33Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2021-11-16T20-37-36Z...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: quay.io/minio/minio tag: RELEASE.2021-11-24T23-19-33Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2021-11-16T20-37-36Z...

kubernetes cluster domain where minio is running ## clusterDomain: cluster.local ## Set default image, imageTag, and imagePullPolicy. mode is used to indicate the ## image: repository: quay.io/minio/minio tag: RELEASE.2021-12-10T23-03-39Z pullPolicy: IfNotPresent imagePullSecrets: [] # - name: "image-pull-secret" ## Set default image, imageTag, and imagePullPolicy for the `mc` (the minio ## client used to create a default bucket). ## mcImage: repository: quay.io/minio/mc tag: RELEASE.2021-12-16T23-38-39Z...

		if _, err := uuid.Parse(vid); err != nil {
			return opts, InvalidVersionID{
				Bucket:    bucket,
				Object:    object,
				VersionID: vid,
			}
		}
	}

	// default case of passing encryption headers to backend
	opts, err = getDefaultOpts(r.Header, false, nil)
	if err != nil {
		return opts, err
	}
	opts.PartNumber = partNumber
	opts.VersionID = vid

```

由于我们必须用 `Query(default=None)` 替换默认值 `None`，`Query` 的第一个参数同样也是用于定义默认值。

所以：

```Python
q: Union[str, None] = Query(default=None)
```

...使得参数可选，等同于：

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

但是 `Query` 显式地将其声明为查询参数。

然后，我们可以将更多的参数传递给 `Query`。在本例中，适用于字符串的 `max_length` 参数：

```Python
q: Union[str, None] = Query(default=None, max_length=50)
```

     * If not set, System.in will be used by default.
     *
     * @return the input stream, or null if not set
     */
    @Nullable
    InputStream in();

    /**
     * Returns the output stream to be used for the Maven execution.
     * If not set, System.out will be used by default.
     *
     * @return the output stream, or null if not set
     */
    @Nullable

		}
	default:
		m.disconnect("handler blocked", true)
	}
}

func (m *muxServer) unblockSend(seq uint32) {
	if !m.checkSeq(seq) {
		return
	}
	m.recvMu.Lock()
	defer m.recvMu.Unlock()
	if m.outBlock == nil {
		// Closed
		return
	}
	select {
	case m.outBlock <- struct{}{}:
	default:
		gridLogIf(m.ctx, errors.New("output unblocked overflow"))