# Set callbacks to `read_callback_native`, `write_callback` and `event_callback` of `conn`
	fun setcb(conn: Connection) import Connection.read_callback_native,
	Connection.write_callback, Connection.event_callback, CString `{
		Connection_incr_ref(conn);
		bufferevent_setcb(self,
			(bufferevent_data_cb)c_read_cb,
			(bufferevent_data_cb)c_write_cb,
			(bufferevent_event_cb)c_event_cb, conn);
	`}