Function clutter_behaviour_scale_get_bounds 

pub unsafe extern "C" fn clutter_behaviour_scale_get_bounds(
    scale: *mut ClutterBehaviourScale,
    x_scale_start: *mut c_double,
    y_scale_start: *mut c_double,
    x_scale_end: *mut c_double,
    y_scale_end: *mut c_double,
)