Mac crash report: "Bridge OS Version"?


I just got a crash report from a customer. It contains following lines

OS Version:            Mac OS X 10.13.2 (17C205)
Report Version:        12
Bridge OS Version:     3.0 (14Y661)

I don’t have Bridge OS Version in a report on my Mac using also 10.13.2, too.

So I’m just curious: Any clue what this line means? An internet search did not show any documentation…

Bridge may be the Touchbar.

I thought so. Any clue about official documentation related to this?

There is no urgent need, just curious. And it makes it perhaps easier to investigate future reports…