libdata-treedumper-renderer-gtk-perl 0.02-1 (armhf binary) in ubuntu xenial

 This widget is the GUI equivalent of Data::TreeDumper; it will display a perl
 data structure in a TreeView, allowing you to fold and unfold child data
 structures and get a quick feel for what's where. Right-clicking anywhere in
 the view brings up a context menu, from which the user can choose to expand
 or collapse all items.