How To add metadata for Google Home

  • openHAB version: 2.5

  • Items configuration related to the issue
    Switch lightDoor “Sanca Entrada [%s]” (FF_Room_Hall, gLight) [“Lighting”, “Switchable”] { channel=“knx:device:bridge:devLightA1OnOff:lightA1OnOff” }

How to add metadata: { ga=“Light” } ?
If I create a simple item without channel work, but if I add ga=“Light” inside or outside of {} not is working. How can help me?

{channel="", ga=""}