# Header 1 { #header-1 }

Some text

## Header 2 { #header-2 }

Some more text

### Header 3 { #header-3 }

Even more text

# Header 4 { #header-4 }

A bit more text

# Extra header

# Header 1 { #header-1 }

Some text

## Header 2 { #header-2 }

Some more text

### Header 3 { #header-3 }

Even more text

Header 4 is missing

A bit more text

#Not a header

# Header 1 { #header-1 }

Some text with a link to [FastAPI](https://fastapi.tiangolo.com).

## Header 2 { #header-2 }

Two links here: [How to](https://fastapi.tiangolo.com/how-to/) and [Project Generators](project-generation.md){.internal-link target=_blank}.

### Header 3 { #header-3 }

Another link: [**FastAPI** Project Generators](project-generation.md "Link title"){.internal-link target=_blank} with title.

# Header 4 { #header-4 }

# Advanced Security { #advanced-security }

## Additional Features { #additional-features }

There are some extra features to handle security apart from the ones covered in the [Tutorial - User Guide: Security](../../tutorial/security/index.md).

/// tip

The next sections are **not necessarily "advanced"**.

And it's possible that for your use case, the solution is in one of them.

///

## Read the Tutorial first { #read-the-tutorial-first }

## Do not Separate Schemas { #do-not-separate-schemas }

Now, there are some cases where you might want to have the **same schema for input and output**.

Probably the main use case for this is if you already have some autogenerated client code/SDKs and you don't want to update all the autogenerated client code/SDKs yet, you probably will want to do it at some point, but maybe not right now.

   * @see IntStream#findFirst()
   * @throws NullPointerException if the last element of the stream is null
   */
  public static OptionalInt findLast(IntStream stream) {
    // findLast(Stream) does some allocation, so we might as well box some more
    java.util.Optional<Integer> boxedLast = findLast(stream.boxed());
    return boxedLast.map(OptionalInt::of).orElse(OptionalInt.empty());
  }

  /**

    response = client.post(
        "/items/", json={"name": "Foo", "price": "50.5", "description": "Some Foo"}
    )
    assert response.status_code == 200
    assert response.json() == {
        "name": "Foo",
        "price": 50.5,
        "description": "Some Foo",
        "tax": None,
    }


def test_post_with_str_float_description_tax(client: TestClient):
    response = client.post(

  }

  public void testFileTraverser_file() throws Exception {
    File file = newFile("some-file");

    assertThat(Files.fileTraverser().breadthFirst(file)).containsExactly(file);
  }

  public void testFileTraverser_singleFile() throws Exception {
    File file = newFile("some-file");

    assertThat(Files.fileTraverser().breadthFirst(rootDir)).containsExactly(rootDir, file);
  }

  }

  public void testFileTraverser_file() throws Exception {
    File file = newFile("some-file");

    assertThat(Files.fileTraverser().breadthFirst(file)).containsExactly(file);
  }

  public void testFileTraverser_singleFile() throws Exception {
    File file = newFile("some-file");

    assertThat(Files.fileTraverser().breadthFirst(rootDir)).containsExactly(rootDir, file);
  }

# Code blocks { #code-blocks }

Some text

```python
# This is a sample Python code block
def hello_world():
    # Comment with indentation
    print("Hello, world!")  # Print greeting
```

Some more text

```toml
# This is a sample TOML code block
title = "TOML Example"  # Title of the document
```

And more text

```console
// Use the command "live" and pass the language code as a CLI argument