{
  "type": "minecraft:weighted_random_selector",
  "features": [
    {
      "data": {
        "feature": {
          "type": "minecraft:simple_block",
          "to_place": {
            "id": "minecraft:tall_seagrass",
            "properties": {
              "half": "lower"
            }
          }
        },
        "placement": [
          {
            "type": "minecraft:block_predicate_filter",
            "predicate": {
              "type": "minecraft:matching_blocks",
              "blocks": "minecraft:water",
              "offset": [
                0,
                1,
                0
              ]
            }
          }
        ]
      },
      "weight": 30
    },
    {
      "data": {
        "feature": {
          "type": "minecraft:simple_block",
          "to_place": {
            "id": "minecraft:seagrass"
          }
        },
        "placement": []
      },
      "weight": 70
    }
  ]
}