fn main() {

    let input = std::fs::File::open("sample.ics").unwrap();

    let ical = load_ical(input).unwrap();

    println!("Loaded iCal document with {} object", ical.len());

    for component in &ical[0].components {

        match component {

            CalendarComponent::TimeZone(tz) => {

                println!(

                    "Found timezone with name: {}",

                    tz.get_property::<TimeZoneIdProperty>().unwrap().value().id

                );

            }

            CalendarComponent::Event(e) => {

                println!(

                    "Found event with description: {}",

                    e.get_property::<DescriptionProperty>().unwrap().value()

                );

                let attendees = e.get_properties::<AttendeeProperty>();

                let role_param = attendees[0].get_param::<RoleParam>().unwrap();

                println!(

                    "Found attendee {} with role: {:?}",

                    attendees[0].value(),

                    role_param.role

                );

            }

    let validation_errors = validate_model(&ical[0]).unwrap();

    assert!(

        validation_errors.is_empty(),

}