/lib/partman/choose_method/52lvm/choices is in ubiquity 2.21.63.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #!/bin/sh
[ -f /var/lib/partman/lvm ] || exit 0
. /lib/partman/lib/lvm-base.sh
dev=$1
id=$2
pv_allowed "$dev" "$id" || exit 0
db_metaget partman/method_long/lvm description
printf "lvm\t${RET}\n"
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