[
  {
    "id": "mexico-l9-return",
    "operations": [
      {
        "op": "reverse",
        "replace": "r7935440:0",
        "source": "r443224:0"
      }
    ],
    "reason": "Feasibility named patch: r7935440 ends at Mixiuhca instead of Pantitlán. Reverse r443224. An absent station in both directions is not invented."
  }
]