* its runtime check.
   *
   * <p>An example use case for this method is in implementing an {@code Iterator<T>} whose {@code
   * next} field is lazily initialized. The type of that field would be {@code @Nullable T}, and the
   * code would be responsible for populating a "real" {@code T} (which might still be the value

    /**
     * Gets the source from which the model was read.
     *
     * @return The source from which the model was read, never {@code null}.
     */
    @Nonnull
    ModelSource getSource();

    /**
     * Gets the file model.
     *
     * @return the file model, never {@code null}.
     */
    @Nonnull
    Model getFileModel();

    /**

## Misture `Path`, `Query` e parâmetros de corpo

Primeiro, é claro, você pode misturar `Path`, `Query` e declarações de parâmetro no corpo da requisição livremente e o **FastAPI** saberá o que fazer.

E você também pode declarar parâmetros de corpo como opcionais, definindo o valor padrão com `None`:

{* ../../docs_src/body_multiple_params/tutorial001_py310.py hl[17:19] *}

  internal class LegacyRedirectInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
      val response = chain.proceed(chain.request())
      val code = response.code
      if (code != HTTP_TEMP_REDIRECT && code != HTTP_PERM_REDIRECT) return response
      val method = response.request.method
      if (method == "GET" || method == "HEAD") return response

   *       C}, {@code C} is skipped for equality test.
   *   <li>Equality test is not performed on method return values unless the method is a visible
   *       static factory method whose return type is {@code C} or {@code C}'s subtype.
   * </ul>
   *
   * <p>In all cases, if {@code C} needs custom logic for testing {@code equals()}, you can add an

API. Може містити кілька полів. <details><summary><code>contact</code> поля</summary><table><thead><tr><th>Параметр</th><th>Тип</th><th>Опис</th></tr></thead><tbody><tr><td><code>name</code></td><td><code>str</code></td><td>Ім'я контактної особи або організації.</td></tr><tr><td><code>url</code></td><td><code>str</code></td><td>URL з інформацією для контакту. Повинен бути у форматі URL.</td></tr><tr><td><code>email</code></td><td><code>str</code></td><td>Email контактної особи або організації. Повинен...

 * The representation of a linear transformation between real numbers {@code x} and {@code y}.
 * Graphically, this is the specification of a straight line on a plane. The transformation can be
 * expressed as {@code y = m * x + c} for finite {@code m} and {@code c}, unless it is a vertical
 * transformation in which case {@code x} has a constant value for all {@code y}. In the
 * non-vertical case, {@code m} is the slope of the transformation (and a horizontal transformation

     * throw uhe != null ? uhe : new UnknownHostException("invalid name");
     * }
     */

    Object addr;
    String calledName;

    /**
     * Create a <code>UniAddress</code> by wrapping an {@code InetAddress} or
     * <code>NbtAddress</code>.
     *
     * @param addr
     *            wrapped address
     */
    public UniAddress(final Object addr) {
        if (addr == null) {

/**
 * A support class for {@code ListenableFuture} implementations to manage their listeners. An
 * instance contains a list of listeners, each with an associated {@code Executor}, and guarantees
 * that every {@code Runnable} that is {@linkplain #add added} will be executed after {@link
 * #execute()} is called. Any {@code Runnable} added after the call to {@code execute} is still

 *   }
 * }
 * }
 *
 * <h3>{@code Monitor}</h3>
 *
 * <p>This version adds some verbosity around the {@code Guard} objects, but removes that same
 * verbosity, and more, from the {@code get} and {@code set} methods. {@code Monitor} implements the
 * same efficient signaling as we had to hand-code in the {@code ReentrantLock} version above.
 * Finally, the programmer no longer has to hand-code the wait loop, and therefore doesn't have to