Adwaita icon theme is used by the GNOME desktop.
+Adwaita widget theme that matches the GNOME awaita theme.
+HighContrast widget theme that matches the GNOME highcontrast theme.
+QGnomePlatform is a Qt Platform Theme aimed to accommodate as much of GNOME settings as possible and utilize them in Qt applications without modifying them - making them fit into the environment as well as possible.
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