{ "name": "Root", "value": 10,
  "children": [
   { "name": "Leaf 1", "value": 3 }, 
   { "name": "Node 1", "value": 10,
     "children": [
       { "name": "Leaf 2", "value": 6 }, 
       { "name": "Node 2", "value": 10,
         "children": [
           { "name": "Leaf 3", "value": 2 }, 
           { "name": "Leaf 4", "value": 8 }
         ]
       }
     ]
   }
  ]
}

Add new sample data file with default properties
Add new sample data file with default properties
