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

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

  "builtIn": true,
  "mixed": true,

  "serviceName": "MixedDatasource",

  "module": "app/plugins/datasource/mixed/datasource",
  "metrics": true
}