https://directory.fsf.org/wiki/Element_Tree
Element Tree - Free Software Directory
element treefree softwaredirectory
https://bugzilla.mozilla.org/show_bug.cgi?id=752631
752631 - Add-on SDK is blocking assignment of tree element's view in non-browser window prior to...
RESOLVED (poirot.alex) in Add-on SDK Graveyard - General. Last updated 2012-08-02.
https://manpages.ubuntu.com/manpages/xenial/man3/Tree::Simple::Visitor::FindByUID.3pm.html
Ubuntu Manpage: Tree::Simple::Visitor::FindByUID - A Visitor for finding an element in a...
A Visitor for finding an element in a Tree::Simple hierarchy by UID
https://manpages.ubuntu.com/manpages/resolute/man3/Config%3A%3AModel%3A%3ARole%3A%3ANodeLoader.3pm.html
Ubuntu Manpage: Config::Model::Role::NodeLoader - Load Node element in configuration tree
Load Node element in configuration tree