I've been trying to se the quicklox javascript chat API but when I try to retrieve the custom data that is joined to the chat dialog I cannot find a method for it.

I have tried querying it separately as follows:

var className = "CustomDialogItem";
            var data = {_parent_id  :dialog._id};
            // use filter or ids to get records:
            QB.data.list(className, data, function (error, result) {
              if (error) {
                console.log(error);
              } else {
                console.log("result"+result);
              }
            });

Strill doesn't retrieve any result. How do I go about it?