API Reference > presentation-common > PresentationRules > ChildNodeSpecificationBase > hasChildren hasChildren hasChildren: "Always" = undefined | "Never" = undefined | "Unknown" = undefined 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/rules/hierarchy/ChildNodeSpecification.ts Line 55 Last Updated: 13 June, 2024