zombiefrozen in control

potentialspawn.json:
[
    {
        "dimension": [0, 69],
        "mobs": [
            {
                "mob": "mod_lavacow:zombiefrozen",
                "weight": 8,
                "groupcountmin": 1,
                "groupcountmax": 3
            }
        ],
        "biometype": ["COLD", "FOREST", "PLAINS"],
        "winter": true
    },
    {
        "dimension": [0, 69],
        "mobs": [
            {
                "mob": "mod_lavacow:zombiefrozen",
                "weight": 5,
                "groupcountmin": 1,
                "groupcountmax": 3
            }
        ],
        "biometype": "SNOWY"
    }
]
-------------------------------
spawn.json:
[
  {
    "potion": "minecraft:glowing,10000,1"
  },
  {
    "dimension": [0, 69],
    "mob": "mod_lavacow:zombiefrozen",
    "maxcount": {
      "mob":"mod_lavacow:zombiefrozen",
      "amount": 10,
      "perplayer": true
    },
    "onjoin": true,
    "result": "default"
  }
]