## Mix `Path`, `Query` and body parameters { #mix-path-query-and-body-parameters }

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

And you can also declare body parameters as optional, by setting the default to `None`:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note

   * the more direct await* methods, but should be reliable enough in practice to avoid flakiness of
   * this test. (And if it isn't, we'd like to know about it first!)
   */
  public void testAwaitFullGc() {
    CountDownLatch finalizerRan = new CountDownLatch(1);
    WeakReference<Object> ref =
        new WeakReference<Object>(
            new Object() {

    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {
    // not bothering testing all variations, since we know they share implementations
    assertThat(Striped.lock(100).size()).isAtLeast(100);
    assertTrue(Striped.lock(256).size() == 256);
    assertThat(Striped.lazyWeakLock(100).size()).isAtLeast(100);

    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {
    // not bothering testing all variations, since we know they share implementations
    assertThat(Striped.lock(100).size()).isAtLeast(100);
    assertTrue(Striped.lock(256).size() == 256);
    assertThat(Striped.lazyWeakLock(100).size()).isAtLeast(100);

Calls are executed in one of two ways:

 * **Synchronous:** your thread blocks until the response is readable.

/// danger

Never store the plain password of a user or send it in a response like this, unless you know all the caveats and you know what you are doing.

///

## Add an output model { #add-an-output-model }

We can instead create an input model with the plaintext password and an output model without it:

## Multiple path and query parameters { #multiple-path-and-query-parameters }

You can declare multiple path parameters and query parameters at the same time, **FastAPI** knows which is which.

And you don't have to declare them in any specific order.

They will be detected by name:

{* ../../docs_src/query_params/tutorial004_py310.py hl[6,8] *}

    Class<E> result = classOrNull == null ? (Class<E>) (Class<?>) Object.class : classOrNull;
    return result;
  }

  /*
   * If I understand correctly:
   *
   * This needs to be a @JsMethod so that J2CL knows to look for a JavaScript implemention of
   * it in Platform.native.js. (The JavaScript implementation inline below is visible to *GWT*, but
   * *J2CL* doesn't look at it.)
   *

      PhantomReference<Object> frqReference) {
    this.queue = queue;

    this.finalizableReferenceClassReference = new WeakReference<>(finalizableReferenceClass);

    // Keep track of the FRQ that started us so we know when to stop.
    this.frqReference = frqReference;
  }

  /** Loops continuously, pulling references off the queue and cleaning them up. */
  @SuppressWarnings("InfiniteLoopStatement")
  @Override

    private String realm;

    @Override
    public void init(final ServletConfig config) throws ServletException {
        super.init(config);

        /* Set jcifs.smb1 properties we know we want; soTimeout and cachePolicy to 10min.
         */
        Config.setProperty("jcifs.smb1.smb.client.soTimeout", "300000");
        Config.setProperty("jcifs.smb1.netbios.cachePolicy", "600");