* 👷🏻 Add GitHub Action label-checker. PR [#12005](https://github.com/fastapi/fastapi/pull/12005) by [@tiangolo](https://github.com/tiangolo).
* 👷 Add label checker GitHub Action. PR [#12004](https://github.com/fastapi/fastapi/pull/12004) by [@tiangolo](https://github.com/tiangolo).

            values[field.name] = v_
    return values, errors


def is_union_of_base_models(field_type: Any) -> bool:
    """Check if field type is a Union where all members are BaseModel subclasses."""
    from fastapi.types import UnionType

    origin = get_origin(field_type)

    # Check if it's a Union type (covers both typing.Union and types.UnionType in Python 3.10+)
    if origin is not Union and origin is not UnionType: