Function gio_2_0_sys::g_resolver_lookup_service_async

pub unsafe extern "C" fn g_resolver_lookup_service_async(
    resolver: *mut GResolver, 
    service: *const gchar, 
    protocol: *const gchar, 
    domain: *const gchar, 
    cancellable: *mut GCancellable, 
    callback: Option<GAsyncReadyCallback>, 
    user_data: gpointer
)