BASH_FUNC_which%%
DBUS_SESSION_BUS_ADDRESS
GUESTFISH_INIT
GUESTFISH_OUTPUT
GUESTFISH_PS1
GUESTFISH_RESTORE
HOME
LANG
LESSOPEN
LOGNAME
PATH
PWD
SHELL
SHLVL
SSH_CLIENT
SSH_CONNECTION
S_COLORS
USER
XDG_RUNTIME_DIR
XDG_SESSION_ID
_
which_declare