Examples Improvement based Animation

{
  "Version": 1.0,
  "attributemap": {
    "double/head_left": {
      "double/basic_hammer_left": {
        "type": "improvement",
        "key": "double/head_left",
        "improvement": "double/warforged",
        "config": {
          "attributes": {
            "parent": "bettercombat:hammer"
          }
        }
      }
   }
}