Console menu entry for iperf3 server?

[drosophila]

Like this diff for /usr/local/sbin/opnsense-shell, only conditionally applied when the plugin is installed / reversed if removed?

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> CMD_IPERF3="/usr/local/bin/iperf3 -s"
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> iperf3)
>     shift
>     exec ${CMD_IPERF3} "${@}"
>     ;;
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< echo
---
> echo "                                        14) iperf3 server"
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>     ;;
> 14)
>     ${CMD_IPERF3}
Is this possible, or don't the installers for these plugins have access to the systems innards?