How to use the @hookstate/core.Downgraded function in @hookstate/core

this.touched = function (l) {
            var t = _this.getTouched(l.path);
            if (t !== undefined) {
                // For optimization purposes, there is nothing being used from the link value
                // as a result it is left untracked and no rerender happens for the result of this function
                // when the source value is updated.
                // We do the trick to fix it, we mark the value being 'deeply used',
                // so any changes for this value or any nested will trigger rerender.
                var _1 = l.with(core.Downgraded).value;
                return t;
            }
            return initial.Initial(l).modified();
        };
    }

this.getModified = function (l) {
            l.with(core.Downgraded);
            return !isEqual(l.value, _this.getInitial(l.path));
        };
        this.initialState = cloneDeep(initialValue);