I don't know if this is a bug or not, but I would like that expandable option to be taken into account when doing expandAll() / collapseAll().

Take a look on the fiddle bellow.


- "Folder 2" which has one child, has expandable: false configured.

- It is rendered correctly, and cannot be expanded manually

- thus, expandAll() / collapseAll() does NOT take this option into account and expands / collapses it