Function gio_sys::g_bus_watch_name_on_connection_with_closures

pub unsafe extern "C" fn g_bus_watch_name_on_connection_with_closures(
    connection: *mut GDBusConnection, 
    name: *const c_char, 
    flags: GBusNameWatcherFlags, 
    name_appeared_closure: *mut GClosure, 
    name_vanished_closure: *mut GClosure
) -> c_uint