Future<U> minimum<U>(U selector(T object))

Finds the minimum of some ManagedObject property.

selector identifies the property being evaluated, e.g.

    var query = new Query<User>();
    var youngestUser = await query.reduce.minimum((user) => user.age);

The property must be an attribute and its type must be String, int, double, or DateTime.

Source 

Future<U> minimum<U>(U selector(T object));