if message.get_content_maintype() == "application":
                                    subtype = message.get_content_subtype()
                                    if subtype == "json" or subtype.endswith("+json"):
                                        json_body = await request.json()
                            if json_body != Undefined:

/**
 * termynal.js
 *
 * @author Ines Montani <******@****.***>
 * @version 0.0.1
 * @license MIT
 */

:root {
    --color-bg: #252a33;
    --color-text: #eee;
    --color-text-subtle: #a2a2a2;
}

[data-termynal] {
    width: 750px;
    max-width: 100%;
    background: var(--color-bg);
    color: var(--color-text);
    /* font-size: 18px; */
    font-size: 15px;

# Body - Nested Models

With **FastAPI**, you can define, validate, document, and use arbitrarily deeply nested models (thanks to Pydantic).

## List fields

You can define an attribute to be a subtype. For example, a Python `list`:

=== "Python 3.10+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/body_nested_models/tutorial001_py310.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="14"