wireless-docs/assets/minecraft/models/block/black_stained_glass_pane_side.json

{
  "parent": "minecraft:block/template_glass_pane_side",
  "textures": {
    "edge": {
      "force_translucent": true,
      "sprite": "minecraft:block/black_stained_glass_pane_top"
    },
    "pane": {
      "force_translucent": true,
      "sprite": "minecraft:block/black_stained_glass"
    }
  }
}