chapelier fou

I'd like to make a device that observes the "solo" state of a Group, and solo all the tracks contained in the group according to this state. 

I can't find a decent way to get the ids of the tracks contained in a group. 

I'd like to make a device that observes the "solo" state of a Group, and solo all the tracks contained in the group according to this state. 
I can't find a decent way to get the ids of the tracks contained in a group. 
Any ideas ? 

I'd like to make a device that observes the "solo" state of a Group, and solo all the tracks contained in the group according to this state.

m4l-get-tracks-contained-in-a-group

https://maxforlive.com/library/device/3447/solo-safe

I use this 
https://maxforlive.com/library/device/3447/solo-safe

Well, this automatically set solo for the track containing the device whenever another track is soloed, doesn't it ? 

I want to solo the tracks that are in the same group only.

Well, this automatically set solo for the track containing the device whenever  another track is soloed, doesn't it ? 
That's not what I'm looking for. 
I want to solo the tracks that are in the same group only. 

M4L : Get tracks contained in a group ?