pub fn run_relation_link_test<F>(
    on_parent: &RelationField,
    on_child: &RelationField,
    id_only: bool,
    only: &[(&str, Option<&str>)],
    exclude: &[(&str, Option<&str>)],
    required_capabilities: BitFlags<ConnectorCapability>,
    _: (&str, &str),
    test_fn: F
)where
    F: for<'a> AsyncFn<'a, Runner, DatamodelWithParams, Result<(), TestError>> + 'static,