/lib/partman/recipes/80multi is in ubiquity 2.10.16.
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 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60  | partman-auto/text/multi_scheme ::
1 1 1 free
	$iflabel{ gpt }
	$reusemethod{ }
	method{ biosgrub } .
128 512 256 ext2
	$defaultignore{ }
	method{ format }
	format{ }
	use_filesystem{ }
	filesystem{ ext2 }
	mountpoint{ /boot } .
300 800 350 $default_filesystem
	$lvmok{ }
	method{ format }
	format{ }
	use_filesystem{ }
	$default_filesystem{ }
	mountpoint{ / } .
500 3000 9000 $default_filesystem
	$lvmok{ }
	method{ format }
	format{ }
	use_filesystem{ }
	$default_filesystem{ }
	mountpoint{ /usr } .
300 1500 3000 $default_filesystem
	$lvmok{ }
	method{ format }
	format{ }
	use_filesystem{ }
	$default_filesystem{ }
	mountpoint{ /var } .
96 512 200% linux-swap
	$lvmok{ }
	$reusemethod{ }
	method{ swap }
	format{ } .
20 300 400 $default_filesystem
	$lvmok{ }
	method{ format }
	format{ }
	use_filesystem{ }
	$default_filesystem{ }
	mountpoint{ /tmp } .
300 3000 -1 $default_filesystem
	$lvmok{ }
	method{ format }
	format{ }
	use_filesystem{ }
	$default_filesystem{ }
	mountpoint{ /home } .
 |