There are 2 major components in the tree package.
The first one is called just a Tree. This components render the node views and divided the rows by inserting the HTML tag BR.
Here you can test the simple file system demo - file explorer.
The second one is called TreeTable. It use Contrib:Table to render the rows with expanded tree nodes. You could pass additional table columns to the TreeTable as parameters.
Here you can test the simple file system demo - file explorer.