minecraft-assets/data/minecraft/worldgen/template_pool/bastion/units/edges.json

{
  "elements": [
    {
      "element": {
        "element_type": "minecraft:single_pool_element",
        "location": "minecraft:bastion/units/edges/edge_0",
        "processors": "minecraft:housing",
        "projection": "rigid"
      },
      "weight": 1
    }
  ],
  "fallback": "minecraft:empty"
}