def get_compat_model_name_map(fields: List[ModelField]) -> ModelNameMap:
        return {}

    def get_definitions(
        *,
        fields: List[ModelField],
        schema_generator: GenerateJsonSchema,
        model_name_map: ModelNameMap,
        separate_input_output_schemas: bool = True,
    ) -> Tuple[
        Dict[
            Tuple[ModelField, Literal["validation", "serialization"]], JsonSchemaValue