def _maybe_transform_key(key: str, type_: type) -> str:
    """Transform the given `data` based on the annotations provided in `type_`.

    Note: this function only looks at `Annotated` types that contain `PropertyInfo` metadata.
    """
    annotated_type = _get_annotated_type(type_)
    if annotated_type is None:
        # no `Annotated` definition for this type, no transformation needed
        return key

    # ignore the first argument as it is the actual type
    annotations = get_args(annotated_type)[1:]
    for annotation in annotations:
        if isinstance(annotation, PropertyInfo) and annotation.alias is not None:
            return annotation.alias

    return key
Transform the given `data` based on the annotations provided in `type_`.

    Note: this function only looks at `Annotated` types that contain `PropertyInfo` metadata.
    
src/anthropic/_utils/_transform.py