if len(fields) == 1 and lenient_issubclass(first_field.type_, BaseModel):
        fields_to_extract = get_cached_model_fields(first_field.type_)
        return fields_to_extract
    return fields


def get_flat_params(dependant: Dependant) -> List[ModelField]:
    flat_dependant = get_flat_dependant(dependant, skip_repeats=True)
    path_params = _get_flat_fields_from_params(flat_dependant.path_params)