ploof-pack/faithless/assets/minecraft/models/block/prismarine_brick_slab_top.json

{
  "parent": "block/slab_top",
  "textures": {
    "bottom": "block/prismarine_bricks_bottom",
    "top": "block/prismarine_brick_topslab_top",
    "side": "block/prismarine_brick_slab_side"
  }
}