API Reference > ui-components > Tree > AbstractTreeNodeLoader AbstractTreeNodeLoader Class Abstract node loader implementation which loads nodes into provided model source. Extended by AbstractTreeNodeLoaderWithProvider Implements ITreeNodeLoader Methods Name Description constructor(modelSource: TreeModelSource): AbstractTreeNodeLoader Protected load(parent: TreeModelNode | TreeModelRootNode, childIndex: number): Observable<LoadedNodeHierarchy> ProtectedAbstract An abstract method to load a node at the specific index for the specified parent. loadNode(parent: TreeModelNode | TreeModelRootNode, childIndex: number): Observable<TreeNodeLoadResult> Do not override this method. updateModel(loadedHierarchy: LoadedNodeHierarchy): void Protected A method that's called when load loads some nodes and we need to put them into model source. Properties Name Type Description modelSource Accessor ReadOnly TreeModelSource Defined in ui/components/src/ui-components/tree/controlled/TreeNodeLoader.ts Line 65 Last Updated: 11 June, 2024