gitlab-org--gitlab-foss/spec/fixtures/lib/gitlab/metrics/dashboard/schemas/embedded_panel_groups.json

{
  "type": "object",
  "required": ["panels"],
  "properties": {
    "panels": {
      "type": "array",
      "items": { "$ref": "panels.json" }
    }
  },
  "additionalProperties": false
}