{
  "type": "minecraft:random_boolean_selector",
  "config": {
      
        "feature_false": {
          "feature": "minecraft:swamp_oak",
          "placement": [
            {
              "type": "minecraft:block_predicate_filter",
              "predicate": {
                "type": "minecraft:matching_blocks",
                "offset": [
                  0,
                  -1,
                  0
                ],
                "blocks": ["minecraft:mud","minecraft:muddy_mangrove_roots"]
              }
            }
          ]
        }
    ,
    "feature_true": {
      "feature": "minecraft:oak_bees_005_grown",
      "placement": [
        {
          "type": "minecraft:block_predicate_filter",
          "predicate": {
            "type": "minecraft:not",
            "predicate": {
              "type": "minecraft:matching_block_tag",
              "offset": [
                0,
                -1,
                0
              ],
              "tag": "clifftree:sapling_cannot_grow_no_mud"
            }
          }
        }
      ]
    }
  }
}
