$ sudo apt-get update
$ sudo apt-get install dssi-example-plugins 

dssi-example-plugins is installed in your system.

Make ensure the dssi-example-plugins package were installed using the commands given below,

$ sudo dpkg-query -l | grep dssi-example-plugins *

You will get with dssi-example-plugins package name, version, architecture and description in a table

dssi-example-plugins package basic information: