How to use 'kendo tree view' in JavaScript

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function TreeNode(tree, config) {
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    config || (config = {});
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    this.id   = this._yuid = config.id || this.id || Y.guid('treeNode-');
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    this.tree = tree;
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    if ('label' in config) {
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        this.label = config.label;
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    }
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    this.children = config.children || [];
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    this.data     = config.data || {};
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    this.state    = config.state || {};
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    if (config.canHaveChildren) {
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        this.canHaveChildren = config.canHaveChildren;
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    } else if (this.children.length) {
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        this.canHaveChildren = true;
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    }
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    // Mix in arbitrary properties on the config object, but don't overwrite any
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    // existing properties of this node.
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    Y.mix(this, config);
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    // If this node has children, loop through them and ensure their parent
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    // references are all set to this node.
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    for (var i = 0, len = this.children.length; i < len; i++) {
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        this.children[i].parent = this;
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    }
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}

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function TreeView(grid, options) {
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    this.grid = grid;
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    this.options = options || {};
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    grid.properties.showTreeColumn = false;
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}