plasma-containments-addons 4:4.8.2-0ubuntu3 (amd64 binary) in ubuntu precise

 This package contains additional Plasma containment plugins. These plugins
 allow the user to layout Plasma widgets in groups.
 .
 Plasma widgets can be added to a group dropping them from the Add Widgets
 Explorer or moving them over the group. If it is necessary (like in the grid
 group) a drop zone will be shown (like the one in the panel).
 .
 This package is part of the KDE Plasma addons module.