This would be useful for example to properly handle redirects.

/// tip

You can learn more about this in the documentation for [Behind a Proxy - Enable Proxy Forwarded Headers](../advanced/behind-a-proxy.md#enable-proxy-forwarded-headers){.internal-link target=_blank}

///

## Recap { #recap }

// is encrypted, compressed or uploaded using
// the S3 multipart API then its ETag is not
// necessarily the MD5 of the object content.
//
// For a more detailed description of S3 ETags
// take a look at the package documentation.
type ETag []byte

// String returns the string representation of the ETag.
//
// The returned string is a hex representation of the
// binary ETag with an optional '-<part-number>' suffix.

			for scope := range strings.SplitSeq(scopeList, ",") {
				scope = strings.TrimSpace(scope)
				if scope == "" {
					return c, config.Errorf("empty scope value is not allowed '%s', please refer to our documentation", scopeList)
				}
				scopes = append(scopes, scope)
			}
			// Replace the discovery document scopes by client customized scopes.
			p.DiscoveryDoc.ScopesSupported = scopes
		}

   * ListeningExecutorService}.
   *
   * <p>If the delegate executor was already an instance of {@code ListeningExecutorService}, it is
   * returned untouched, and the rest of this documentation does not apply.
   *
   * @since 10.0
   */
  @GwtIncompatible // TODO
  public static ListeningExecutorService listeningDecorator(ExecutorService delegate) {

   <span style="background-color:#007166"><font color="#D3D7CF"> server </font></span>  Documentation at <font color="#729FCF"><u style="text-decoration-style:solid">http://127.0.0.1:8000/docs</u></font>

   <span style="background-color:#007166"><font color="#D3D7CF"> server </font></span>  Documentation at <font color="#729FCF"><u style="text-decoration-style:solid">http://127.0.0.1:8000/docs</u></font>

You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.

   1. DEFINITIONS

   "Contribution" means:

a) in the case of the initial Contributor, the initial code and documentation
distributed under this Agreement, and

      b) in the case of each subsequent Contributor:

         i) changes to the Program, and

         ii) additions to the Program;

   * }
   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the discussion in the {@link ListenableFuture#addListener} documentation. All its warnings
   * about heavyweight listeners are also applicable to heavyweight functions passed to this method.
   *
   * <p>After calling this method, you may not call {@link #finishToFuture()}, {@link

   <span style="background-color:#007166"><font color="#D3D7CF"> server </font></span>  Documentation at <font color="#729FCF"><u style="text-decoration-style:solid">http://127.0.0.1:8000/docs</u></font>