/// <summary>
/// Appends a $setWindowFields to the pipeline.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TWindowFields">The type of the added window fields.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="output">The window fields expression.</param>
/// <returns>The fluent aggregate interface.</returns>
public static IAggregateFluent <BsonDocument> SetWindowFields <TResult, TWindowFields>(
this IAggregateFluent <TResult> aggregate,
Expression <Func <ISetWindowFieldsPartition <TResult>, TWindowFields> > output)
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
return(aggregate.AppendStage(PipelineStageDefinitionBuilder.SetWindowFields(output)));
}
