DataSource, any other properties ?

[Richard]

The documentation shows a minimalist example of DataSource of

dataSource: [

            {

                text: "Item 1",

                items: [

                    { text: "Item 1.1" },

                    { text: "Item 1.2" }

                ]

            },

            { text: "Item 2" }

        ]

The source code for treeview template suggests there might be other properties, such as expanded, allowed in the dataSource.

I tried this which did not seem to work

text: "Item 1", expanded: true,


                items: [

                    { text: "Item 1.1" },

                    { text: "Item 1.2" }

Is treeview data source restricted to having only the properties items: and text: ?