///

## Type Hints với Metadata Annotations

Python cũng có một tính năng cho phép đặt **metadata bổ sung** trong những gợi ý kiểu dữ liệu này bằng cách sử dụng `Annotated`.

//// tab | Python 3.9+

	Result  struct {
		Credentials auth.Credentials `xml:"Credentials,omitempty"`
	} `xml:"AssumeRoleWithCertificateResult"`
	Metadata struct {
		RequestID string `xml:"RequestId,omitempty"`
	} `xml:"ResponseMetadata,omitempty"`
}

// AssumeRoleWithCustomTokenResponse contains the result of a successful
// AssumeRoleWithCustomToken request.

import org.dbflute.outsidesql.OutsideSqlOption;
import org.dbflute.outsidesql.factory.OutsideSqlExecutorFactory;
import org.dbflute.s2dao.jdbc.TnResultSetHandlerFactory;
import org.dbflute.s2dao.metadata.TnBeanMetaDataFactory;
import org.dbflute.twowaysql.factory.SqlAnalyzerFactory;

/**
 * Implementation of DBFlute's InvokerAssistant interface for OpenSearch integration.

				}
				if _, nbuf, err := msgp.ReadUint32Bytes(b); err == nil {
					// Read metadata CRC (added in v2, ignore if not found)
					b = nbuf
				}

				hdr, v, err := decodeXLHeaders(v)
				if err != nil {
					return nil, err
				}
				type version struct {
					Idx      int
					Header   json.RawMessage
					Metadata json.RawMessage
				}
				versions := make([]version, hdr.versions)

        when(mockChannelManager.getHealthyChannels()).thenReturn(Arrays.asList(channel1, channel2));

        ChannelInfo selected = loadBalancer.selectChannel(queryInfo);
        // Should prefer less loaded channel for metadata operations
        assertEquals(channel1, selected);
    }

    @Test
    void testAffinityBasedStrategy() throws Exception {
        loadBalancer.setStrategy(LoadBalancingStrategy.AFFINITY_BASED);

If you have a group of **cookies** that are related, you can create a **Pydantic model** to declare them. 🍪

This would allow you to **re-use the model** in **multiple places** and also to declare validations and metadata for all the parameters at once. 😎

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

/// tip

This same technique applies to `Query`, `Cookie`, and `Header`. 😎

///

////

/// tip

You could use the same technique to extend the JSON Schema and add your own custom extra info.

For example you could use it to add metadata for a frontend user interface, etc.

///

/// info

OpenAPI 3.1.0 (used since FastAPI 0.99.0) added support for `examples`, which is part of the **JSON Schema** standard.

// in 'pool.bin', this is eventually used for decommissioning the pool.
func (z *erasureServerPools) Init(ctx context.Context) error {
	// Load rebalance metadata if present
	if err := z.loadRebalanceMeta(ctx); err == nil {
		// Start rebalance routine if we can reload rebalance metadata.
		z.StartRebalance()
	}

	meta := poolMeta{}
	if err := meta.load(ctx, z.serverPools[0], z.serverPools); err != nil {
		return err
	}

	failOnErr(xl2.Load(trimmed))
	if len(xl2.data) != 0 {
		t.Fatal("data, was not trimmed, bytes left:", len(xl2.data))
	}
	// Corrupt metadata, last 5 bytes is the checksum, so go a bit further back.
	trimmed[len(trimmed)-10] += 10
	if err := xl2.Load(trimmed); err == nil {
		t.Fatal("metadata corruption not detected")
	}
}

// TestUsesDataDir tests xlMetaV2.UsesDataDir
func TestUsesDataDir(t *testing.T) {

* Metadata Agent Improvements ([#66485](https://github.com/kubernetes/kubernetes/pull/66485), [@bmoyles0117](https://github.com/bmoyles0117))
    * Bump metadata agent version to 0.2-0.0.21-1.
    * Expand the metadata agent's access to all API groups.
    * Remove metadata agent config maps in favor of command line flags.
    * Update the metadata agent's liveness probe to a new /healthz handler.