```

1. Essa é a função geradora. É definida como "função geradora" porque contém declarações `yield` nela.
2. Ao utilizar o bloco `with`, nós garantimos que o objeto semelhante a um arquivo é fechado após a função geradora ser finalizada. Isto é, após a resposta terminar de ser enivada.

  ): Boolean {
    lock.assertHeld()

    // If this connection is not accepting new exchanges, we're done.
    if (calls.size >= allocationLimit || noNewExchanges) return false

    // If the non-host fields of the address don't overlap, we're done.
    if (!this.route.address.equalsNonHost(address)) return false

    // If the host exactly matches, we're done: this connection can carry the address.

import okio.buffer
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Tag
import org.junit.jupiter.api.Test

@Tag("Slow")
class RealWebSocketTest {
  // NOTE: Fields are named 'client' and 'server' for cognitive simplicity. This differentiation has
  // zero effect on the behavior of the WebSocket API which is why tests are only written once
  // from the perspective of a single peer.

   END OF TERMS AND CONDITIONS

   APPENDIX: How to apply the Apache License to your work.

      To apply the Apache License to your work, attach the following
      boilerplate notice, with the fields enclosed by brackets "{}"
      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a

    }


    /**
     * Compares two <tt>NtlmPasswordAuthentication</tt> objects for equality.
     * 
     * Two <tt>NtlmPasswordAuthentication</tt> objects are equal if their caseless domain and username fields are equal
     *
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals ( Object obj ) {
        if ( obj instanceof NtlmPasswordAuthenticator ) {

		fi.Metadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(objectActualSize, 10)
	}

	if opts.DataMovement {
		fi.SetDataMov()
	}

	// Update all erasure metadata, make sure to not modify fields like
	// checksum which are different on each disks.
	for index := range partsMetadata {
		if partsMetadata[index].IsValid() {
			partsMetadata[index].Size = fi.Size
			partsMetadata[index].ModTime = fi.ModTime

		} else {
			finalMD5Bytes = append(finalMD5Bytes, md5Bytes...)
		}
	}
	s3MD5 := fmt.Sprintf("%s-%d", getMD5Hash(finalMD5Bytes), len(parts))
	return s3MD5
}

// Clean unwanted fields from metadata
func cleanMetadata(metadata map[string]string) map[string]string {
	// Remove STANDARD StorageClass
	metadata = removeStandardStorageClass(metadata)

    public static final String ALL_LANGUAGES = "all";

    public static final String INVALID_NUMERIC_PARAMETER = "-1";

    public static final String FACET_FIELD_PREFIX = "field:";

    public static final String FACET_QUERY_PREFIX = "query:";

    public static final String MATCHES_ALL_QUERY = "*:*";

    @Deprecated

```

/// tip

Pydantic 是 FastAPI 中所有数据验证和序列化的核心，当你在没有设默认值的情况下使用 `Optional` 或 `Union[Something, None]` 时，它具有特殊行为，你可以在 Pydantic 文档中阅读有关<a href="https://docs.pydantic.dev/latest/concepts/models/#required-optional-fields" class="external-link" target="_blank">必需可选字段</a>的更多信息。

///

### 使用Pydantic中的`Required`代替省略号(`...`)

如果你觉得使用 `...` 不舒服，你也可以从 Pydantic 导入并使用 `Required`：

```Python hl_lines="2  8"

type validator struct{}

func checkFields(un *unstructured.Unstructured) error {
	var errs error
	for key := range un.Object {
		if _, ok := validFields[key]; !ok {
			errs = multierror.Append(errs, fmt.Errorf("unknown field %q", key))
		}
	}
	return errs
}

func (v *validator) validateResource(istioNamespace, defaultNamespace string, un *unstructured.Unstructured, writer io.Writer) (validation.Warning, error) {