/// <summary>
/// Appends a $bucketAuto stage to the pipeline.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <typeparam name="TValue">The type of the value.</typeparam>
/// <param name="aggregate">The aggregate.</param>
/// <param name="groupBy">The expression providing the value to group by.</param>
/// <param name="buckets">The number of buckets.</param>
/// <param name="options">The options (optional).</param>
/// <returns>The fluent aggregate interface.</returns>
public static IAggregateFluent <AggregateBucketAutoResult <TValue> > BucketAuto <TResult, TValue>(
this IAggregateFluent <TResult> aggregate,
Expression <Func <TResult, TValue> > groupBy,
int buckets,
AggregateBucketAutoOptions options = null)
{
Ensure.IsNotNull(aggregate, nameof(aggregate));
return(aggregate.AppendStage(PipelineStageDefinitionBuilder.BucketAuto(groupBy, buckets, options)));
}
