Function clutter_sys::clutter_actor_get_preferred_size

pub unsafe extern "C" fn clutter_actor_get_preferred_size(
    self_: *mut ClutterActor, 
    min_width_p: *mut c_float, 
    min_height_p: *mut c_float, 
    natural_width_p: *mut c_float, 
    natural_height_p: *mut c_float
)