im-switch software package provides virtual package provided by im-config, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install im-switch
im-switch is installed in your system.
Make ensure the im-switch package were installed using the commands given below,
$ sudo dpkg-query -l | grep im-switch*
You will get with im-switch package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Virtual packages |
| Package | im-switch |
| Version | |
| Description | virtual package provided by im-config |
| Sub Section | Virtual |