* This class contains information about any errors that occurred during the operation
 * and the time taken to complete the operation.
 */
public class SuggestDeleteResponse {
    /** List of errors that occurred during the operation. */
    protected final List<Throwable> errors = new ArrayList<>();
    /** Time taken for the operation in milliseconds. */
    protected final long took;

    /**

In our code example above, we don't use it directly, but we pass it to FastAPI for it to use it.

The `lifespan` parameter of the `FastAPI` app takes an **async context manager**, so we can pass our new `lifespan` async context manager to it.

{* ../../docs_src/events/tutorial003_py39.py hl[22] *}

## Alternative Events (deprecated) { #alternative-events-deprecated }

    }

    /**
     * Sets the time taken for the search in milliseconds.
     * @param tookInMillis The time taken in milliseconds.
     */
    public void setTookInMillis(final long tookInMillis) {
        this.tookInMillis = tookInMillis;
    }

    /**
     * Returns the time taken for the search in milliseconds.
     * @return The time taken in milliseconds.
     */
    public long getTookInMillis() {

FastAPI uses a **unique ID** for each *path operation*, which is used for the **operation ID** and also for the names of any needed custom models, for requests or responses.

You can customize that function. It takes an `APIRoute` and outputs a string.

For example, here it is using the first tag (you will probably have only one tag) and the *path operation* name (the function name).

/**
 * Represents a response for a suggest request.
 * This class holds the details of the response including the index, time taken, words, total count, and suggested items.
 */
public class SuggestResponse implements Response {
    /** The index name. */
    protected final String index;

    /** The time taken in milliseconds. */
    protected final long tookMs;

    /** The list of suggested words. */

        // Value taken from p2
        // ----------------------------------------------------------------------

        assertEquals("mailing-list", p4.getMailingLists().get(0).getName());

        // ----------------------------------------------------------------------
        // Value taken from p1
        // ----------------------------------------------------------------------

    /** Time taken for the operation in milliseconds. */
    protected final long took;

    /**
     * Constructor for SuggestIndexResponse.
     * @param numberOfSuggestDocs The number of suggest documents.
     * @param numberOfInputDocs The number of input documents.
     * @param errors A list of Throwables representing errors.
     * @param took The time taken for the operation in milliseconds.
     */

     *
     * @return the index
     */
    public String getIndex() {
        return index;
    }

    /**
     * Returns the time taken to generate the response in milliseconds.
     *
     * @return the time taken in milliseconds
     */
    public long getTookMs() {
        return tookMs;
    }

    /**
     * Returns the list of popular words.
     *

This can be quite noticeable when using `docker compose`. See this Docker Compose FAQ section for more technical details: <a href="https://docs.docker.com/compose/faq/#why-do-my-services-take-10-seconds-to-recreate-or-stop" class="external-link" target="_blank">Why do my services take 10 seconds to recreate or stop?</a>.

#### Directory Structure { #directory-structure }

You should now have a directory structure like:

```
.
├── app

    protected final long allRecordCount;

    /** The relation type indicating how the record count should be interpreted (e.g., "eq", "gte"). */
    protected final String allRecordCountRelation;

    /** The time taken to execute the search query in milliseconds. */
    protected final long queryTime;

    /** Flag indicating whether the search results are partial due to timeout or other constraints. */