Also, subtypes of /image do not appear, but procs and vars do. The subtype will not appear unless a proc or var is defined under it.
//none of these appear:
sound
thing/poop
proc/random_new_behavior()
icon
thing/hi
proc/random_new_behavior()
database
hi
proc/random_new_behavior()
matrix
test
proc/random_new_behavior()
exception
hi
proc/new_behavior()
//also
image
new_subtype //This subtype doesn't appear, but the proc definition does.
proc/random_new_behavior()
//everything else appears:
random/hi
list //can't actually extend this
savefile //can't actually extend this
turf/a
datum/a
atom/movable/a
area/a
turf/a
obj/a
mob/a
client/a
var
poop, kaiochao, ssx, hi //why does this compile, why does this work
verb
hi()
proc
bye()
world
proc/new_behavior()
test/a