{
  "name": "request.headers.list",
  "description": "Lists request headers",
  "signature": {
    "output": {
      "mode": "Lambda",
      "kind": "http-header-map,lambda-tree",
      "element-kind": "http-header-value,text",
      "description": "Resolves to one child node per request header, with the header name as the node name and its value as the node value"
    }
  }
}