Is lttng-userspace-dev necessary?

In awu-2025.02_caret_cie_guide.md, it asks reader to execute sudo apt install -y lttng-tools lttng-modules-dkms lttng-userspace-dev if lttng not present. However, in an ubuntu 2022.04.5 which just flashed:

$ sudo apt install -y lttng-tools lttng-modules-dkms lttng-userspace-dev Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package lttng-userspace-dev