Update parent task after child deletion

[neelamallik]

Hi Team, I'm unable to see any changes on Task table and how to check parent

 task could you please clarify this one

(function executeRule(current, previous /*null when async*/) {

    if (current.parent) {

        var parentTask = new GlideRecord('task');

        if(parentTask.get(current.parent)) {

            parentTask.child_count = (parentTask.child_count || 1) - 1;

            parentTask.update();

        }

    }

})(current, previous);