libskinlf-java 6.7-9 (amd64 binary) in ubuntu bionic

 Skin Look And Feel allows Java developers to write skinnable application
 using the Swing toolkit. Skin Look And Feel is able to load themepacks
 (a bundle of GTK+ - The Gimp Toolkit - and KDE - The K Desktop
 Environment - skins) to enhance your application GUI controls such as
 Buttons, Checks, Radios, Scrollbars, Progress Bar, Lists, Tables,
 Internal Frames, Colors, Background Textures, Regular Windows.
 .
 Skin Look And Feel (aka SkinLF) also includes NativeSkin to create irregular
 windows.