{
  "variants": {
    "type=bottom": [{
      "model": "minecraft:block/birch_slab"
    },{"model": "minecraft:block/birch_slab2"}],
    "type=double": [{
      "model": "minecraft:block/birch_planks"},
      {"model": "minecraft:block/birch_planks2"}],
    "type=top": [{
      "model": "minecraft:block/birch_slab_top"},
      {"model": "minecraft:block/birch_slab_top2"}]
  }
}