public static PipelineDefinition<TInput, AggregateBucketAutoResult<TValue>> BucketAuto<TInput, TIntermediate, TValue>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	Expression<Func<TIntermediate, TValue>> groupBy,
	int buckets,
	AggregateBucketAutoOptions options = null,
	ExpressionTranslationOptions translationOptions = null
)

<ExtensionAttribute>
Public Shared Function BucketAuto(Of TInput, TIntermediate, TValue) ( 
	pipeline As PipelineDefinition(Of TInput, TIntermediate),
	groupBy As Expression(Of Func(Of TIntermediate, TValue)),
	buckets As Integer,
	Optional options As AggregateBucketAutoOptions = Nothing,
	Optional translationOptions As ExpressionTranslationOptions = Nothing
) As PipelineDefinition(Of TInput, AggregateBucketAutoResult(Of TValue))

[<ExtensionAttribute>]
static member BucketAuto : 
        pipeline : PipelineDefinition<'TInput, 'TIntermediate> * 
        groupBy : Expression<Func<'TIntermediate, 'TValue>> * 
        buckets : int * 
        ?options : AggregateBucketAutoOptions * 
        ?translationOptions : ExpressionTranslationOptions 
(* Defaults:
        let _options = defaultArg options null
        let _translationOptions = defaultArg translationOptions null
*)
-> PipelineDefinition<'TInput, AggregateBucketAutoResult<'TValue>>