ields.
        While this can be useful for round-tripping, it is usually recommended to use the dedicated
        `round_trip` parameter instead.
    round_trip: If True, dumped values should be valid as input for non-idempotent types such as Json[T].
    warnings: How to handle serialization errors. False/"none" ignores them, True/"warn" logs errors,
        "error" raises a [`PydanticSerializationError`][pydantic_core.PydanticSerializationError].
    fallback: A function to call when an unknown value is encountered. If not provided,
        a [`PydanticSerializationError`][pydantic_core.PydanticSerializationError] error is raised.
    serialize_as_any: Whether to serialize fields with duck-typing serialization behavior.

Returns:
    A JSON string representation of the model.
)r