@type t() :: %Gleanex.Client.RecommendationsResponse{
  backendTimeMillis: integer() | nil,
  errorInfo: Gleanex.Client.ErrorInfo.t() | nil,
  generatedQnaResult: Gleanex.Client.GeneratedQna.t() | nil,
  requestID: String.t() | nil,
  results: [Gleanex.Client.SearchResult.t()] | nil,
  sessionInfo: Gleanex.Client.SessionInfo.t() | nil,
  structuredResults: [Gleanex.Client.StructuredResult.t()] | nil,
  trackingToken: String.t() | nil
}