API Reference > presentation-common > PresentationRules > ChildNodeSpecificationBase > hasChildren hasChildren hasChildren: "Always" | "Never" | "Unknown" This tells the rules engine that nodes produced using this specification always or never have children. Defaults to Unknown. Note: setting this flag to Always or Never improves performance. Defined in presentation/common/src/presentation-common/rules/hierarchy/ChildNodeSpecification.ts Line 55 Last Updated: 12 June, 2024