Function gio_2_0_sys::g_socket_client_connect_to_uri_async

pub unsafe extern "C" fn g_socket_client_connect_to_uri_async(
    client: *mut GSocketClient, 
    uri: *const gchar, 
    default_port: u16, 
    cancellable: *mut GCancellable, 
    callback: Option<GAsyncReadyCallback>, 
    user_data: gpointer
)