pub unsafe extern "C" fn ges_effect_class_register_rate_property(
klass: *mut GESEffectClass,
element_name: *const c_char,
property_name: *const c_char,
) -> gboolean
pub unsafe extern "C" fn ges_effect_class_register_rate_property(
klass: *mut GESEffectClass,
element_name: *const c_char,
property_name: *const c_char,
) -> gboolean