"""
        if self.cid is not None:
            fetcher = self._create_credentials_fetcher()
            return RefreshableCredentials.create_from_metadata(
                metadata=fetcher(),
                refresh_using=fetcher,
                method=self.METHOD,
            )
        else:
            return None

    def _create_credentials_fetcher(self):
        method = self.METHOD

	objAPI, disks, err := prepareErasure(t.Context(), 8)
	if err != nil {
		t.Fatalf("Failed to initialize object layer: %v", err)
	}
	defer removeRoots(disks)
	setObjectLayer(objAPI)

	// Prepare bucket metadata
	globalBucketMetadataSys = NewBucketMetadataSys()
	globalBucketObjectLockSys = &BucketObjectLockSys{}
	globalBucketVersioningSys = &BucketVersioningSys{}

	lcXML := `
<LifecycleConfiguration>
       <Rule>

import jakarta.validation.constraints.Size;

/**
 * Form class for editing crawling information in the admin interface.
 * This form handles the editing of crawling session data, which tracks
 * the status and metadata of web crawling operations.
 *
 */
public class EditForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        // Default constructor
    }

    /**

    # Additional setup is contained in ci/official/envs/rbe.
    CONTAINER_IP_ADDR=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' tf)
    netsh advfirewall firewall add rule name="Allow Metadata Proxy" dir=in action=allow protocol=TCP localport=80 remoteip="$CONTAINER_IP_ADDR"

    # Stop non-essential indexing and link tracking services that
    # may lock new files or symlinks.

 */
package org.apache.maven.artifact.resolver;

import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.wagon.events.TransferListener;

/**
 */

import org.eclipse.aether.impl.MetadataGenerator;
import org.eclipse.aether.impl.MetadataGeneratorFactory;
import org.eclipse.aether.installation.InstallRequest;

/**
 * Maven G level metadata generator factory.
 *
 * @deprecated since 4.0.0, use {@code maven-api-impl} jar instead
 */
@Named(PluginsMetadataGeneratorFactory.NAME)
@Singleton
@Deprecated(since = "4.0.0")

		return
	}
	var zb0002 uint32
	zb0002, err = dc.ReadMapHeader()
	if err != nil {
		err = msgp.WrapError(err, "Metadata")
		return
	}
	if z.Metadata == nil {
		z.Metadata = make(map[string]string, zb0002)
	} else if len(z.Metadata) > 0 {
		clear(z.Metadata)
	}
	var field []byte
	_ = field
	for zb0002 > 0 {
		zb0002--
		var za0001 string
		za0001, err = dc.ReadString()

## 可选文件上传 { #optional-file-upload }

你可以通过使用标准类型注解并将 `None` 作为默认值的方式将一个文件参数设为可选:

{* ../../docs_src/request_files/tutorial001_02_an_py310.py hl[9,17] *}

## 带有额外元数据的 `UploadFile` { #uploadfile-with-additional-metadata }

你也可以将 `File()` 与 `UploadFile` 一起使用，例如，设置额外的元数据:

{* ../../docs_src/request_files/tutorial001_03_an_py310.py hl[9,15] *}

## 多文件上传 { #multiple-file-uploads }

FastAPI 支持同时上传多个文件。

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.legacy.metadata;

import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;

/**
 * ResolutionGroup

import java.util.Set;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.metadata.ResolutionGroup;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;