For AI agents: the docs index is at https://angular2-tree.readme.io/v6.1.0/llms.txt. Append .md to any documentation page URL to get its markdown version.
Case: when tree is hidden (for example inside tab or modal), it is not rendered when it becomes visible.
Solution: after it becomes visible (preferably using setTimeout) - call tree.sizeChanged(), which recalculates the rendered nodes according to the actual viewport size.
