4:  "interrupted system call",
	5:  "input/output error",
	6:  "device not configured",
	7:  "argument list too long",
	8:  "exec format error",
	9:  "bad file descriptor",
	10: "no child processes",
	11: "resource deadlock avoided",
	12: "cannot allocate memory",
	13: "permission denied",
	14: "bad address",
	15: "block device required",
	16: "device busy",
	17: "file exists",

	4:  "interrupted system call",
	5:  "input/output error",
	6:  "device not configured",
	7:  "argument list too long",
	8:  "exec format error",
	9:  "bad file descriptor",
	10: "no child processes",
	11: "resource deadlock avoided",
	12: "cannot allocate memory",
	13: "permission denied",
	14: "bad address",
	15: "block device required",
	16: "device busy",
	17: "file exists",

	4:   "interrupted system call",
	5:   "input/output error",
	6:   "no such device or address",
	7:   "argument list too long",
	8:   "exec format error",
	9:   "bad file descriptor",
	10:  "no child processes",
	11:  "resource temporarily unavailable",
	12:  "cannot allocate memory",
	13:  "permission denied",
	14:  "bad address",
	15:  "block device required",
	16:  "device or resource busy",

	4:   "interrupted system call",
	5:   "input/output error",
	6:   "no such device or address",
	7:   "argument list too long",
	8:   "exec format error",
	9:   "bad file descriptor",
	10:  "no child processes",
	11:  "resource temporarily unavailable",
	12:  "cannot allocate memory",
	13:  "permission denied",
	14:  "bad address",
	15:  "block device required",
	16:  "device or resource busy",

				return $obj.length ? $obj : false;
			},
			_get_next		: function (obj, strict) {
				obj = this._get_node(obj);
				if(obj === -1) { return this.get_container().find("> ul > li:first-child"); }
				if(!obj.length) { return false; }
				if(strict) { return (obj.nextAll("li").size() > 0) ? obj.nextAll("li:eq(0)") : false; }

				if(obj.hasClass("jstree-open")) { return obj.find("li:eq(0)"); }

        // at this level, otherwise we spam for no reason. We can remove this once the deprecation
        // turns into an error, since the error will short-circuit the child notifications.
        if (emittedDeprecation) {
            DeprecationLogger.whileDisabled(() -> notifyChildren(type));
        } else {
            notifyChildren(type);
        }
    }

	4:   "interrupted system call",
	5:   "input/output error",
	6:   "device not configured",
	7:   "argument list too long",
	8:   "exec format error",
	9:   "bad file descriptor",
	10:  "no child processes",
	11:  "resource deadlock avoided",
	12:  "cannot allocate memory",
	13:  "permission denied",
	14:  "bad address",
	15:  "block device required",
	16:  "resource busy",
	17:  "file exists",

// client to connect to it. It returns a recordingConn that wraps the resulting
// connection.
func (test *serverTest) connFromCommand() (conn *recordingConn, child *exec.Cmd, err error) {
	l, err := net.ListenTCP("tcp", &net.TCPAddr{
		IP:   net.IPv4(127, 0, 0, 1),
		Port: 0,
	})
	if err != nil {
		return nil, nil, err
	}
	defer l.Close()

        }

        private <P> ActivationFrame nextFrame(String property, Function<P, InputLocationTracker> child) {
            @SuppressWarnings("unchecked")
            final Optional<P> parent = (Optional<P>) stk.peek().parent;
            return new ActivationFrame(property, parent.map(child));
        }

        @Override
        public Activation transformActivation(Activation target) {

	3:   "no such process",
	4:   "interrupted system call",
	5:   "I/O error",
	6:   "no such device or address",
	7:   "arg list too long",
	8:   "exec format error",
	9:   "bad file number",
	10:  "no child processes",
	11:  "resource temporarily unavailable",
	12:  "not enough space",
	13:  "permission denied",
	14:  "bad address",
	15:  "block device required",
	16:  "device busy",
	17:  "file exists",