answering my own question:
ogra@localhost:~$ grep managed /usr/share/subiquity/console-conf-wrapper if [ "$(snap managed)" = "true" ]; then ogra@localhost:~$ grep PRETTY /etc/os-release PRETTY_NAME="Ubuntu Core 18"
answering my own question:
ogra@localhost:~$ grep managed /usr/share/ subiquity/ console- conf-wrapper
if [ "$(snap managed)" = "true" ]; then
ogra@localhost:~$ grep PRETTY /etc/os-release
PRETTY_NAME="Ubuntu Core 18"