IExceptionFilter members different from documentation

[glenhboonzaier]

According to the documentation:

public class RollbarExceptionFilter : IExceptionFilter
{
    public void OnException(ExceptionContext filterContext)
    {
        if (filterContext.ExceptionHandled)
            return;

        (new RollbarClient()).SendException(filterContext.Exception);
    }
}

However, IExceptionFilter requires the following methods:

public bool AllowMultiple { get; }

public Task ExecuteExceptionFilterAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
{
    throw new System.NotImplementedException();
}

Please update the documentation.