Function vips_sys::g_signal_new_class_handler

pub unsafe extern "C" fn g_signal_new_class_handler(
    signal_name: *const gchar, 
    itype: GType, 
    signal_flags: GSignalFlags, 
    class_handler: GCallback, 
    accumulator: GSignalAccumulator, 
    accu_data: gpointer, 
    c_marshaller: GSignalCMarshaller, 
    return_type: GType, 
    n_params: guint,
     ...
) -> guint