Pattern name for returning an object containing data and success/failure

What is the name of the pattern where a method returns an object with properties for status, failure messages, and the desired data (as opposed to raising exceptions)?

As an example, RestSharp uses this pattern:

var response = client.Execute<T>(request);

// incomplete example - you'd want to check more here
if (response.ErrorException == null) return response.Data;


public abstract class RestResponseBase
{
    /// <summary>
    /// Status of the request. Will return Error for transport errors.
    /// HTTP errors will still return ResponseStatus.Completed, check StatusCode instead
    /// </summary>
    public ResponseStatus ResponseStatus { get; set; }
    public HttpStatusCode StatusCode { get; set; }
    public string ErrorMessage { get; set; }
    public Exception ErrorException { get; set; }
    // ...
}

public class RestResponse<T> : RestResponseBase, IRestResponse<T>
{
    public T Data { get; set; }
    // ...
}