/usr/share/xsessions/icewm-session.desktop is in icewm 1.3.7-1ubuntu1.
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 | [Desktop Entry]
Version=1.0
Encoding=UTF-8
Name=icewm
Name[en_US]=icewm
Comment=Simple and fast window manger
Terminal=false
Exec=icewm-session
TryExec=icewm-session
[Window Manager]
SessionManaged=true
|