anjuta-extras software package provides plugins and extras for anjuta, 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 anjuta-extras
anjuta-extras is installed in your system.
Make ensure the anjuta-extras package were installed using the commands given below,
$ sudo dpkg-query -l | grep anjuta-extras *
You will get with anjuta-extras package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | GNOME |
| Package | anjuta-extras |
| Version | 3.10.0-5 |
| Description | plugins and extras for anjuta |
| Sub Section | gnome |