}

    private static String getKey(Plugin plugin, boolean extension) {
        String version = ArtifactUtils.toSnapshotVersion(plugin.getVersion());
        return (extension ? "extension>" : "plugin>") + plugin.getGroupId() + ":" + plugin.getArtifactId() + ":"
                + version;
    }

For example, let's add <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" class="external-link" target="_blank">ReDoc's OpenAPI extension to include a custom logo</a>.

### Normal **FastAPI**

First, write all your **FastAPI** application as normally:

{* ../../docs_src/extending_openapi/tutorial001.py hl[1,4,7:9] *}

 * information among plugins, is this more like an extension point - do we need a sort of bus for
 * application data - do we need a dictionary for our applications like Apple does. We could easily
 * hook into this and this is the model we need to follow - how many of our REST services do not map
 * directory to a method in the application interface?
 *
 * - research extension points versus plugins
 *

/// tip

This is a low level extension point.

If you only need to declare additional responses, a more convenient way to do it is with [Additional Responses in OpenAPI](additional-responses.md){.internal-link target=_blank}.

///

You can extend the OpenAPI schema for a *path operation* using the parameter `openapi_extra`.

### OpenAPI Extensions

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package gradlebuild.testcleanup.extension

import org.gradle.api.provider.Property


/**
 *  An extension for project build script to configure whether the leftover files should be treated:
 *  report only, or a failure.
 */
interface TestFileCleanUpExtension {

    @JvmStatic
    @JvmName("parse")
    fun String.toMediaTypeOrNull(): MediaType? = commonToMediaTypeOrNull()

    @JvmName("-deprecated_get")
    @Deprecated(
      message = "moved to extension function",
      replaceWith =
        ReplaceWith(
          expression = "mediaType.toMediaType()",
          imports = ["okhttp3.MediaType.Companion.toMediaType"],
        ),

            metadata.setPlugins(new ArrayList<>(recessive.getPlugins()));
        }

        artifacts.clear();
    }

    private String getKey(String classifier, String extension) {
        return classifier + ':' + extension;
    }

    @Override
    public String getGroupId() {
        return metadata.getGroupId();
    }

    @Override
    public String getArtifactId() {

        String classifier = artifact.getClassifier();
        String extension = artifact.getExtension();
        return getArtifactPath(groupId, artifactId, version, classifier, extension);
    }

    private Path getArtifactPath(
            String groupId, String artifactId, String version, String classifier, String extension) {
        Path repo = getProjectLocalRepo();
        return repo.resolve(groupId)

    def void addMixin(String plugin, String mixinClass) {
        mixinClasses.add(new MixinMetaData(plugin, mixinClass))
    }

    def void addExtension(String plugin, String extension, String extensionClass) {
        extensionClasses.add(new ExtensionMetaData(plugin, extension, extensionClass))
    }

				<include>fess.in.bat</include>
				<include>fess.bat</include>
				<include>service.bat</include>
			</includes>
		</fileSet>
		<fileSet>
			<directory>src/main/assemblies/extension</directory>
			<outputDirectory>fess-${project.version}/extension</outputDirectory>
		</fileSet>
		<fileSet>
			<filtered>false</filtered>
			<directory>src/main/assemblies/files</directory>