Config example

inventory:
  blocks:
    layout: normal
    items:
      stone:
        data: "minecraft:stone"
        amount: 64
        price: 10
      cobblestone:
        material: cobblestone
        amount: 64
        price: 5
  special:
    layout: special
    layout-scheme:
        -[0,0,0,0,0,0,0,0,0]
        -[0,0,X,X,X,X,X,0,0]
        -[0,0,0,0,0,0,0,0,0]
    items:
      gigaregion:
        material: STONE
        price: -1