/// <summary>
/// Appends a $replaceRoot stage to the pipeline.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TNewResult">The type of the new result.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="newRoot">The new root.</param>
/// <returns>
/// The fluent aggregate interface.
/// </returns>
public static IAggregateFluent <TNewResult> ReplaceRoot <TResult, TNewResult>(
this IAggregateFluent <TResult> aggregate,
Expression <Func <TResult, TNewResult> > newRoot)
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
return(aggregate.AppendStage(PipelineStageDefinitionBuilder.ReplaceRoot(newRoot)));
}
