Hi,how to bind select tag with model?This does not work: {    tag: 'select',    value: '{#model.selectedItem}',    content: [        {            tag: 'option',            content: 'item_1',            props: {                value: 'item_1',        ...

hello,I have few problems, after hours still don't know how to solve them.First, how to use ObservableDictionary? When I thy to insert key:value pairs to dict, there is only one key and one value in dict.this.myData(new nx.data.ObservableDictionary()...