[
  {
    "filename": "src/game.lua",
    "primary_label": "undefined variable `undefined_var`",
    "secondary_labels": [],
    "notes": [],
    "code": {
      "name": "undefined_variable",
      "severity": "Error"
    },
    "span": {
      "start": {"line": 5, "character": 1},
      "end": {"line": 5, "character": 14}
    }
  },
  {
    "filename": "src/game.lua",
    "primary_label": "accessing undefined field `nonexistent` on type `table`",
    "secondary_labels": [],
    "notes": [],
    "code": {
      "name": "undefined_field",
      "severity": "Warning"
    },
    "span": {
      "start": {"line": 12, "character": 3},
      "end": {"line": 12, "character": 15}
    }
  },
  {
    "filename": "src/game.lua",
    "primary_label": "variable `_unused` is set but never used",
    "secondary_labels": [],
    "notes": [],
    "code": {
      "name": "unused_variable",
      "severity": "Note"
    },
    "span": {
      "start": {"line": 20, "character": 5},
      "end": {"line": 20, "character": 12}
    }
  }
]