jupyterlab/packages/completer-extension/schema/files.json

{
  "title": "File Editor Completer",
  "description": "File editor completer settings.",
  "jupyter.lab.shortcuts": [
    {
      "command": "completer:invoke-file",
      "keys": ["Tab"],
      "selector": ".jp-FileEditor .jp-mod-completer-enabled"
    }
  ],
  "properties": {},
  "additionalProperties": false,
  "type": "object"
}