/usr/share/app-install/desktop/q4wine:q4wine.desktop is in app-install-data 15.10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | [Desktop Entry]
X-AppInstall-Package=q4wine
X-AppInstall-Popcon=329
X-AppInstall-Section=universe
Categories=Qt;System;Emulator;
GenericName=utility for Wine applications and prefixes management.
Exec=q4wine -b %u
Icon=q4wine
Name=Q4Wine
StartupNotify=true
Terminal=false
Type=Application
MimeType=application/x-ms-dos-executable;
Keywords=Wine;Windows;Emulator;
X-Ubuntu-Gettext-Domain=app-install-data
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