API Reference > presentation-common > Hierarchies > NodeKey > NodeKey.isClassGroupingNodeKey NodeKey.isClassGroupingNodeKey Function Checks if the supplied key is an ECClassGroupingNodeKey isClassGroupingNodeKey(key: NodeKey): key is ECClassGroupingNodeKey Parameter Type Description key NodeKey Returns - key is ECClassGroupingNodeKey Defined in presentation/common/src/hierarchy/Key.ts Line 79 Last Updated: 13 June, 2024