gir1.2-ubuntu-app-launch-2 software package provides typelib file for libubuntu-app-launch2, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gir1.2-ubuntu-app-launch-2
gir1.2-ubuntu-app-launch-2 is installed in your system.
Make ensure the gir1.2-ubuntu-app-launch-2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep gir1.2-ubuntu-app-launch-2 *
You will get with gir1.2-ubuntu-app-launch-2 package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Libraries |
| Package | gir1.2-ubuntu-app-launch-2 |
| Version | 0.5+15.10.20150817-0ubuntu3 |
| Description | typelib file for libubuntu-app-launch2 |
| Sub Section | Libs |