@headless-tree/coreInterfacesExpandAllFeatureItemInstanceOn this pageExpandAllFeatureItemInstance Index PropertiescollapseAllexpandAllProperties collapseAllcollapseAll: () => voidType declaration(): voidReturns voidexpandAllexpandAll: (cancelToken?: { current: boolean }) => Promise<void>Type declaration(cancelToken?: { current: boolean }): Promise<void>ParametersoptionalcancelToken: { current: boolean }Returns Promise<void>