request destroy (destructor) {
}

event preferred_changed {
    identity: u32,
}

request get_preferred {
    image_description: id(wp_image_description_v1) (new),
}

request get_preferred_parametric {
    image_description: id(wp_image_description_v1) (new),
}

event preferred_changed2 (since = 2) {
    identity: u64,
}
