core_board.kicad_prl
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    "active_layer_preset": "",
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    "hidden_nets": [],
    "high_contrast_mode": 0,
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    "opacity": {
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    "ratsnest_display_mode": 0,
    "selection_filter": {
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      "footprints": true,
      "graphics": true,
      "keepouts": true,
      "lockedItems": true,
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      "text": true,
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    },
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    "visible_layers": "7fdffff_80000007",
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  },
  "meta": {
    "filename": "core_board.kicad_prl",
    "version": 3
  },
  "project": {
    "files": []
  }
}