LTW3/data/minecraft/loot_tables/blocks/shulker_box.json

{
  "type": "minecraft:block",
  "pools": [
    {
      "rolls": 1.0,
      "bonus_rolls": 0.0,
      "entries": [
        {
          "type": "minecraft:item",
          "functions": [
            {
              "function": "minecraft:copy_name",
              "source": "block_entity"
            },
            {
              "function": "minecraft:copy_nbt",
              "source": "block_entity",
              "ops": [
                {
                  "source": "Lock",
                  "target": "BlockEntityTag.Lock",
                  "op": "replace"
                },
                {
                  "source": "LootTable",
                  "target": "BlockEntityTag.LootTable",
                  "op": "replace"
                },
                {
                  "source": "LootTableSeed",
                  "target": "BlockEntityTag.LootTableSeed",
                  "op": "replace"
                }
              ]
            },
            {
              "function": "minecraft:set_contents",
              "type": "minecraft:shulker_box",
              "entries": [
                {
                  "type": "minecraft:dynamic",
                  "name": "minecraft:contents"
                }
              ]
            }
          ],
          "name": "minecraft:shulker_box"
        }
      ]
    }
  ]
}