Function g_signal_new_class_handler

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