You will see the automatic API docs for the sub-application, including only its own _path operations_, all under the correct sub-path prefix `/subapi`:

<img src="/img/tutorial/sub-applications/image02.png">

If you try interacting with any of the two user interfaces, they will work correctly, because the browser will be able to talk to each specific app or sub-app.

### Technical Details: `root_path` { #technical-details-root-path }

    // Attribute
    // =========
    /** The search helper for performing search operations. */
    @Resource
    protected SearchHelper searchHelper;

    /** The search engine client for interacting with OpenSearch. */
    @Resource
    protected SearchEngineClient searchEngineClient;

    // ===================================================================================

     */
    public SuggestCreator() {
        // do nothing
    }

    private static final Logger logger = LogManager.getLogger(SuggestCreator.class);

    /** The search engine client for interacting with OpenSearch. */
    @Resource
    public SearchEngineClient searchEngineClient;

    /**
     * A nested class for parsing command-line options.
     */
    protected static class Options {

    }

    /**
     * @return the pipe type
     */
    @Override
    public int getPipeType() {
        return this.pipeType;
    }

    /**
     * @return a handle for interacting with the pipe
     */
    @Override
    public SmbPipeHandle openPipe() {
        return new SmbPipeHandleImpl(this);
    }

	bucket := getRandomBucketName()
	err := s.client.MakeBucket(ctx, bucket, minio.MakeBucketOptions{})
	if err != nil {
		c.Fatalf("bucket create error: %v", err)
	}

	// Generate web identity STS token by interacting with OpenID IDP.
	token, err := MockOpenIDTestUserInteraction(ctx, testAppParams, "******@****.***", "dillon")
	if err != nil {
		c.Fatalf("mock user err: %v", err)
	}
	// fmt.Printf("TOKEN: %s\n", token)

    /**
     * Flag indicating whether the client has been initialized.
     */
    protected volatile boolean isInit = false;

    /**
     * The GCS Storage client instance for interacting with Google Cloud Storage.
     */
    protected Storage storage;

    /**
     * Creates a new GcsClient instance.
     */
    public GcsClient() {
        super();
    }

    @Override

    @Resource
    protected LabelTypeBhv labelTypeBhv;

    /** Configuration settings for Fess application */
    @Resource
    protected FessConfig fessConfig;

    /** Client for interacting with the search engine */
    @Resource
    protected SearchEngineClient searchEngineClient;

    /**
     * Retrieves a paginated list of elevate words based on the provided pager criteria.
     *

    // ===================================================================================
    // Attribute
    // =========

    /** Client for interacting with the search engine. */
    @Resource
    protected SearchEngineClient searchEngineClient;

    /** Helper for building and parsing search queries. */
    @Resource
    protected QueryHelper queryHelper;

## Execution of dependencies with `yield` { #execution-of-dependencies-with-yield }

The sequence of execution is more or less like this diagram. Time flows from top to bottom. And each column is one of the parts interacting or executing code.

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation

* Asyncer for handling async and await, concurrency, mixing async and blocking code, prefer it over AnyIO or asyncio.
* SQLModel for working with SQL databases, prefer it over SQLAlchemy.
* HTTPX for interacting with HTTP (other APIs), prefer it over Requests.

## Do not use Pydantic RootModels

Do not use Pydantic `RootModel`, instead use regular type annotations with `Annotated` and Pydantic validation utilities.