Debug Plugin - Musescore 2.0.3 on Win10 - Newbee question

I have started Musescore from command line with -d option. Now I expect some output to be written to stdout in the command line window for existing console.log() commands in the plugin I invoke.
But I do not see any output. Where should I look for the debug output?

There have been some import statements in the code of the plugin (chord identifier). I found in the forum posts, that they might be essential. So I removed the comment marks on that lines, now having these import statements active.

import QtQuick 2.3
import QtQuick.Controls 1.2
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.1
import QtQuick.Controls.Styles 1.3
import MuseScore 1.0

Still I don't see any output.

What should I change.