@Mock
    private TransactNamedPipeInputStream mockPipeIn;

    @InjectMocks
    private TransTransactNamedPipeResponse response;

    @BeforeEach
    void setUp() {
        // Initialize mocks created above
        MockitoAnnotations.openMocks(this);
        // We need to manually inject the mock as we are not using @InjectMocks on the constructor
        response = new TransTransactNamedPipeResponse(mockPipe);
    }

    /**

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[3,25] *}

### Create the callback *path operation* { #create-the-callback-path-operation }

To create the callback *path operation* use the same `APIRouter` you created above.

It should look just like a normal FastAPI *path operation*:

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.

   * to calling it exactly once.
   *
   * @since 10.0 (present in 1.0 as {@code run})
   */
  public void execute() {
    // Lock while we update our state so the add method above will finish adding any listeners
    // before we start to run them.
    RunnableExecutorPair list;
    synchronized (this) {
      if (executed) {
        return;
      }
      executed = true;

    if (supportsRemove) {
      int initialSize = map.size();
      // var oldValue = map.get(keyToRemove);
      map.remove(keyToRemove);
      // This line doesn't hold - see the Javadoc comments above.
      // assertEquals(expectedValue, oldValue);
      assertFalse(map.containsKey(keyToRemove));
      assertEquals(initialSize - 1, map.size());
    } else {

संग
सकता
सकते
सबसे
सभी
साथ
साबुत
साभ
सारा
से
सो
ही
हुआ
हुई
हुए
है
हैं
हो
होता
होती
होते
होना
होने
# additional normalized forms of the above
अपनि
जेसे
होति
सभि
तिंहों
इंहों
दवारा
इसि
किंहें
थि
उंहों
ओर
जिंहें
वहिं
अभि
बनि
हि
उंहिं
उंहें
हें
वगेरह
एसे
रवासा
कोन

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

When you mount a sub-application as described above, FastAPI will take care of communicating the mount path for the sub-application using a mechanism from the ASGI specification called a `root_path`.

That way, the sub-application will know to use that path prefix for the docs UI.

handshake. The best part of this example is that we don't need to make our test code insecure with a
a fake `HostnameVerifier` or `X509TrustManager`.

Certificate Authorities
-----------------------

The above example uses a self-signed certificate. This is convenient for testing but not
representative of real-world HTTPS deployment. To get closer to that we can use `HeldCertificate`

        assertFalse(map.containsKey("maven-test:t09-c"), "maven-test:t09-c is in the project");
    }

    /**
     * Setup exactly the same as the above test, except that the child project
     * now depends upon d, which has a transitive dependency on c.  Even though
     * we did list an exclusion on c, it was only from within the context of

///

## Returning a custom `Response` { #returning-a-custom-response }

The example above shows all the parts you need, but it's not very useful yet, as you could have just returned the `item` directly, and **FastAPI** would put it in a `JSONResponse` for you, converting it to a `dict`, etc. All that by default.

 *       String}.
 * </ul>
 *
 * This is the same behavior as type-variable usages have to Kotlin and to the Checker Framework.
 * Contrast the method above to:
 *
 * <ul>
 *   <li>methods whose return type is a type variable but which can never return {@code null},
 *       typically because the type forbids nullable type arguments: For example, {@code