}

  /**
   * Tests for Predicates.contains(Pattern) and .containsPattern(String). We assume the regex level
   * works, so there are only trivial tests of that aspect. TODO: Fix comment style once annotation
   * stripper is fixed.
   */
  @GwtIncompatible // Predicates.containsPattern
  public void testContainsPattern_apply() {
    Predicate<CharSequence> isFoobar = Predicates.containsPattern("^Fo.*o.*bar$");

          size++;
        }
      }
      return size;
    }

    @Override
    public @Nullable Object[] toArray() {
      // creating an ArrayList so filtering happens once
      return Lists.newArrayList(iterator()).toArray();
    }

    @Override
    @SuppressWarnings("nullness") // b/192354773 in our checker affects toArray declarations

/// info | Bilgi

Dikkat edin, *path operation function* içinde yalnızca tek bir bağımlılık tanımlıyoruz: `query_or_cookie_extractor`.

Ancak **FastAPI**, `query_or_cookie_extractor`'ı çağırmadan önce `query_extractor`'ı önce çözmesi gerektiğini bilir ve onun sonucunu `query_or_cookie_extractor`'a aktarır.

///

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

    * Bu, external geliştiricinin sağladığı bir *external API*'ye (sizin API'nizden) bir POST request gönderilerek yapılır (işte bu "callback"tir).

## Normal **FastAPI** uygulaması { #the-normal-fastapi-app }

Önce callback eklemeden önce normal API uygulamasının nasıl görüneceğine bakalım.

Bir `Invoice` body alacak bir *path operation*'ı ve callback için URL'yi taşıyacak `callback_url` adlı bir query parametresi olacak.

     * builder after this call. This does not change semantics, but may improve performance if
     * {@code expectedValuesPerKey} is a good estimate.
     *
     * <p>This may be called more than once; each newly added key will use the most recent call to
     * {@link #expectedValuesPerKey} as its hint.
     *
     * @throws IllegalArgumentException if {@code expectedValuesPerKey} is negative
     * @since 33.3.0

            )

        # Handle on_startup/on_shutdown locally since Starlette removed support
        # Ref: https://github.com/Kludex/starlette/pull/3117
        # TODO: deprecate this once the lifespan (or alternative) interface is improved
        self.on_startup: list[Callable[[], Any]] = (
            [] if on_startup is None else list(on_startup)
        )

        }
        for (int i = count; i < size; i++) {
          array[i] = null; // for GWT
        }

        List<@Nullable T> list = unmodifiableList(asList(array));
        // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
        if (pad || count == size) {
          return list;
        } else {
          return list.subList(0, count);
        }
      }
    };
  }

  /**

        }
        for (int i = count; i < size; i++) {
          array[i] = null; // for GWT
        }

        List<@Nullable T> list = unmodifiableList(asList(array));
        // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
        if (pad || count == size) {
          return list;
        } else {
          return list.subList(0, count);
        }
      }
    };
  }

  /**

     * an I/O error, or if the target entry is evicted while this editor is active. In either case
     * we delete the editor's created files and prevent new files from being created. Note that once
     * an editor has been detached it is possible for another editor to edit the entry.
     */
    internal fun detach() {
      if (entry.currentEditor == this) {
        if (civilizedFileSystem) {

* The alternative documentation will also reflect the new query parameter and body:

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Recap

In summary, you declare **once** the types of parameters, body, etc. as function parameters.

You do that with standard modern Python types.

You don't have to learn a new syntax, the methods or classes of a specific library, etc.