API Reference > presentation-common > Hierarchies > NodeKey > NodeKey.isGroupingNodeKey NodeKey.isGroupingNodeKey Function Checks if the supplied key is a grouping node key isGroupingNodeKey(key: NodeKey): key is GroupingNodeKey Parameter Type Description key NodeKey Returns - key is GroupingNodeKey Defined in presentation/common/src/hierarchy/Key.ts Line 103 Last Updated: 13 June, 2024