query ListLeadSources {
  listLeadSources {
    id
    label
    slug
    external
    internal
    withDetails
  }
}

{
  "data": {
    "listLeadSources": [
      {
        "id": "id",
        "label": "string",
        "slug": "string",
        "external": true,
        "internal": true,
        "withDetails": true
      }
    ]
  }
}