Inherited from GraphStage[FlowShape[Element, Seq[Element]]]
Inherited from GraphStageWithMaterializedValue[FlowShape[Element, Seq[Element]], NotUsed]
Inherited from Graph[FlowShape[Element, Seq[Element]], NotUsed]
Inherited from AnyRef
Inherited from Any
Accumulates elements of type Element while a property extracted with propertyExtractor remains unchanged, emits an accumulated sequence when the property changes
type of accumulated elements
type of the observed property