Binary package “plasma-widget-folderview” in ubuntu xenial

plasma widget showing the content of a folder

 This package contains the Folder View Plasma widget which is capable of
 displaying and managing contents of any KDE supported location. It can be used
 as a replacement for the traditional "desktop" folder concept in the main
 Plasma shell, but it is a lot more flexible. Folder View is part of the
 initial default KDE 4 desktop configuration.
 .
 This package is part of the KDE base applications module.