API Reference > ui-components > Tree > TreeModelSource TreeModelSource Class Controls tree model and visible tree nodes. It is used to modify model and inform when tree model changes. Methods Name Description constructor(_model: MutableTreeModel = ...): TreeModelSource getModel(): TreeModel Returns tree model. getVisibleNodes(): VisibleTreeNodes Computes and returns flat list of visible tree nodes. modifyModel(callback: (model: MutableTreeModel) => void): void Modifies tree model using provided callback. Properties Name Type Description onModelChanged BeUiEvent<[TreeModel, TreeModelChanges]> Event that is emitted every time tree model is changed. Defined in ui/components/src/ui-components/tree/controlled/TreeModelSource.ts Line 28 Last Updated: 11 June, 2024