{
    "label": "materials",
    "children": [
        {
            "label": "Ninja Materials",
            "children": [
                {
                    "label": "Uber",
                    "id" : "UberMaterial"
                },
                {
                    "label": "Bump Metal",
                    "id" : "BumpMetalMaterial"
                },
                {
                    "label": "Linear Gradient",
                    "id" : "LinearGradientMaterial"
                },
                {
                    "label": "Radial Gradient",
                    "id" : "RadialGradientMaterial"
                },
                {
                    "label": "Flat",
                    "id" : "FlatMaterial"
                }
            ]
        },
        {
            "label": "Custom Materials",
            "children": [
                {
                    "label": "Checker Board",
                    "id" : "CheckerBoard"
                },
                {
                    "label": "Shiny Metal",
                    "id" : "ShinyMetal"
                }
            ]
        }
    ]
}