MCMinecraft Assets Explorer

{
  "model": {
    "type": "minecraft:condition",
    "on_false": {
      "type": "minecraft:model",
      "model": "minecraft:item/fishing_rod"
    },
    "on_true": {
      "type": "minecraft:model",
      "model": "minecraft:item/fishing_rod_cast"
    },
    "property": "minecraft:fishing_rod/cast"
  }
}