Function gio_sys::g_resolver_lookup_service_async

pub unsafe extern fn g_resolver_lookup_service_async(resolver: *mut GResolver,
                                                     service: *const c_char,
                                                     protocol: *const c_char,
                                                     domain: *const c_char,
                                                     cancellable: *mut GCancellable,
                                                     callback: GAsyncReadyCallback,
                                                     user_data: gpointer)