psp_panel/src/assets/demo/data/files-lazy.json

{
    "data": 
    [
        {
            "label": "Lazy Node 0",
            "data": "Node 0",
            "expandedIcon": "pi pi-folder-open",
            "collapsedIcon": "pi pi-folder",
            "leaf": false
        },
        {
            "label": "Lazy Node 1",
            "data": "Node 1",
            "expandedIcon": "pi pi-folder-open",
            "collapsedIcon": "pi pi-folder",
            "leaf": false
        },
        {
            "label": "Lazy Node 1",
            "data": "Node 2",
            "expandedIcon": "pi pi-folder-open",
            "collapsedIcon": "pi pi-folder",
            "leaf": false
        }
    ]
}