jupyterlab/packages/inspector-extension/schema/notebooks.json

{
  "title": "Inspector Notebook",
  "description": "Inspector Notebook settings.",
  "jupyter.lab.menus": {
    "context": [
      {
        "command": "inspector:open",
        "selector": ".jp-Notebook",
        "rank": 50
      }
    ]
  },
  "properties": {},
  "additionalProperties": false,
  "type": "object"
}