* @param request the request to create a key for
     * @throws IOException if an I/O error occurs
     */
    protected abstract void makeKey(Request request) throws IOException;

    /**
     * Reads and returns the key of the next message without consuming it.
     *
     * @return the request key of the next message
     * @throws IOException if an I/O error occurs
     */
    protected abstract Request peekKey() throws IOException;

 *   <li>If no exceptions or errors were thrown in the try block, the <i>first</i> exception thrown
 *       by an attempt to close a resource will be thrown.
 *   <li>Any exception caught when attempting to close a resource that is <i>not</i> thrown (because
 *       another exception is already being thrown) is <i>suppressed</i>.
 * </ul>
 *
 * <p>An exception that is suppressed is added to the exception that <i>will</i> be thrown using

      if (openJSSE != null) {
        return openJSSE
      }
    }

    // An Oracle JDK 9 like OpenJDK, or JDK 8 251+.
    val jdk9 = Jdk9Platform.buildIfSupported()

    if (jdk9 != null) {
      return jdk9
    }

    // An Oracle JDK 8 like OpenJDK, pre 251.
    val jdkWithJettyBoot = Jdk8WithJettyBootPlatform.buildIfSupported()

    if (jdkWithJettyBoot != null) {

     *
     * @return the artifact filter
     */
    ArtifactFilter getCoreArtifactFilter();

    /**
     * Exclude an extension artifact (doesn't affect getArtifactFilter's result, only getExtensionArtifactFilter).
     *
     * @param artifactId an artifact id
     * @deprecated use {@code META-INF/maven/extension.xml} to define artifacts exported by Maven core and plugin
     *             extensions.
     */

  }

  /** Returns an immutable multimap containing a single entry. */
  public static <K, V> ImmutableListMultimap<K, V> of(K k1, V v1) {
    ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();
    builder.put(k1, v1);
    return builder.build();
  }

  /** Returns an immutable multimap containing the given entries, in order. */

        } catch (final IOException e) {
            throw new DictionaryException("Failed to parse " + path, e);
        }
    }

    /**
     * Reloads the synonym dictionary from an input stream.
     *
     * @param updater An optional updater to apply changes.
     * @param in      The input stream to read the dictionary from.
     * @throws DictionaryException if the input stream cannot be parsed.
     */

   */
  public static <K, V> ImmutableSetMultimap<K, V> of(K k1, V v1, K k2, V v2) {
    ImmutableSetMultimap.Builder<K, V> builder = ImmutableSetMultimap.builder();
    builder.put(k1, v1);
    builder.put(k2, v2);
    return builder.build();
  }

  /**
   * Returns an immutable multimap containing the given entries, in order. Repeated occurrences of

 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

          <sourcepath>doesnotexist</sourcepath>

This is an advanced usage that you might not really need, but it's there in case you do.

## Include an `APIRouter` in another { #include-an-apirouter-in-another }

The same way you can include an `APIRouter` in a `FastAPI` application, you can include an `APIRouter` in another `APIRouter` using:

```Python
router.include_router(other_router)
```