# command -v "$1" >/dev/null 2>&1 # not required by policy, see #747320
# which "$1" >/dev/null 2>&1 # is in debianutils (essential) but not on non-debian systems
local OLDIFS="$IFS"
# command -v "$1" >/dev/null 2>&1 # not required by policy, see #747320
# which "$1" >/dev/null 2>&1 # is in debianutils (essential) but not on non-debian systems
local OLDIFS="$IFS"