Swagger
A REST Api is automatically included in the REST Api registration. This REST Api is used by the API Swagger UI. It automatically uses the OpenAPI files that are included in the manifest. The Swagger UI has two different "modes" depending on the number of files in the manifest. If there is only one OpenAPI file, the "simple" mode is used; otherwise, the "collection" mode is used, which adds one more level to the Swagger UI navigation.