[
  ["layerA"],
  ["layerB"],
  [{ "name": "layerC", "barrier": true }],
  ["layerD"],
  [{ "name": "nodeModuleE", "nodeModule": true }],
  ["layerF"],
  ["layerG", "layerH"],
  ["layerI"],
  ["layerJ"],
  ["layerK"],
  [{ "name": "layerL", "language": true }]
]