Mirror mirrorA2 = newMirror("a2", "a,b", "http://a2");
        Mirror mirrorA = newMirror("a", "a", "http://a");
        // make sure repeated entries are skipped
        Mirror mirrorA3 = newMirror("a", "a", "http://a3");

        Mirror mirrorB = newMirror("b", "b", "http://b");
        Mirror mirrorC = newMirror("c", "d,e", "http://de");
        Mirror mirrorC2 = newMirror("c", "*", "http://wildcard");

    def get_missing_field_error(loc: Tuple[str, ...]) -> Dict[str, Any]:
        missing_field_error = ErrorWrapper(MissingError(), loc=loc)  # type: ignore[call-arg]
        new_error = ValidationError([missing_field_error], RequestErrorModel)
        return new_error.errors()[0]  # type: ignore[return-value]

    def create_body_model(
        *, fields: Sequence[ModelField], model_name: str
    ) -> Type[BaseModel]: