bedrock-samples/behavior_pack/loot_tables/equipment/trial_chamber.json

{
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "loot_table",
          "name": "loot_tables/equipment/trial_chamber_chainmail.json",
          "weight": 4
        },
        {
          "type": "loot_table",
          "name": "loot_tables/equipment/trial_chamber_iron.json",
          "weight": 2
        },
        {
          "type": "loot_table",
          "name": "loot_tables/equipment/trial_chamber_diamond.json",
          "weight": 1
        }
      ]
    }
  ]
}