public static PipelineDefinition<TInput, TOutput> Bucket<TInput, TIntermediate, TValue, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	AggregateExpressionDefinition<TIntermediate, TValue> groupBy,
	IEnumerable<TValue> boundaries,
	ProjectionDefinition<TIntermediate, TOutput> output,
	AggregateBucketOptions<TValue> options = null
)

<ExtensionAttribute>
Public Shared Function Bucket(Of TInput, TIntermediate, TValue, TOutput) ( 
	pipeline As PipelineDefinition(Of TInput, TIntermediate),
	groupBy As AggregateExpressionDefinition(Of TIntermediate, TValue),
	boundaries As IEnumerable(Of TValue),
	output As ProjectionDefinition(Of TIntermediate, TOutput),
	Optional options As AggregateBucketOptions(Of TValue) = Nothing
) As PipelineDefinition(Of TInput, TOutput)

[<ExtensionAttribute>]
static member Bucket : 
        pipeline : PipelineDefinition<'TInput, 'TIntermediate> * 
        groupBy : AggregateExpressionDefinition<'TIntermediate, 'TValue> * 
        boundaries : IEnumerable<'TValue> * 
        output : ProjectionDefinition<'TIntermediate, 'TOutput> * 
        ?options : AggregateBucketOptions<'TValue> 
(* Defaults:
        let _options = defaultArg options null
*)
-> PipelineDefinition<'TInput, 'TOutput>