/lib/partman/automatically_partition/ is in ubiquity 2.18.7.
This file is owned by root:root, with mode 0o755.
..
/lib/partman/automatically_partition/10resize_use_free/
/lib/partman/automatically_partition/10resize_use_free/choices
/lib/partman/automatically_partition/10resize_use_free/do_option
/lib/partman/automatically_partition/15reuse/
/lib/partman/automatically_partition/15reuse/choices
/lib/partman/automatically_partition/15reuse/do_option
/lib/partman/automatically_partition/20some_device/
/lib/partman/automatically_partition/20some_device/choices
/lib/partman/automatically_partition/20some_device/do_option
/lib/partman/automatically_partition/25replace/
/lib/partman/automatically_partition/25replace/choices
/lib/partman/automatically_partition/25replace/do_option
/lib/partman/automatically_partition/50biggest_free/
/lib/partman/automatically_partition/50biggest_free/choices
/lib/partman/automatically_partition/50biggest_free/do_option
/lib/partman/automatically_partition/60some_device_lvm/
/lib/partman/automatically_partition/60some_device_lvm/choices
/lib/partman/automatically_partition/60some_device_lvm/do_option
/lib/partman/automatically_partition/70some_device_crypto/
/lib/partman/automatically_partition/70some_device_crypto/choices
/lib/partman/automatically_partition/70some_device_crypto/do_option
/lib/partman/automatically_partition/80custom/
/lib/partman/automatically_partition/80custom/choices
/lib/partman/automatically_partition/80custom/do_option
/lib/partman/automatically_partition/priority
/lib/partman/automatically_partition/question