energylink/public/app/plugins/datasource/mixed/plugin.json

{
  "type": "datasource",
  "name": "-- Mixed --",
  "id": "mixed",

  "builtIn": true,
  "mixed": true,
  "metrics": true,
  "hiddenQueries": true,

  "queryOptions": {
    "minInterval": true
  }
}