Strangely enough, I was / am looking for something like this too.
Because I need to get the value of another Item, from a different group that has an almost identical name, as the triggeringItem.
My use case
A group of Alarm minutes.
When a member of the minutes group passes minute 59, it needs resetting to 0 and the corresponding Hour Item needs increasing
And an equivalent effect when the minutes drop below 0
I’ve nearly done it in DSL, except I can’t seem to be able to get the Hour value from the compiled Hour Item name, because it has become a string.
My thoughts were to do something similar in Node-RED, but as with everyone else, I can’t pick out the triggeringItem