How to send zigbee2mqtt publish commands in domoticz

[gschmidt]

I finally managed to create a Group (with 3 x IKEA GU10 1537R6 Bulbs) in zigbee2mqtt and control the Group with the IKEA Remote 1524/1810 or with zigbee2mqtt publish commands. (e.g. zigbee2mqtt/Keuken_Spots/set {"state": "ON", "brightness":70, "color_temp": 350})

Next step is I have created a Virtual Light Switch in domoticz and I want to execute a zigbee2mqtt publish command to turn ON/OFF the zigbee2mqtt Group of bulbs or set a certain Group state when the Virtual Light Switch is set to ON/OFF.

Does somebody has an example how to handle this?