Currently with the new behavior of group_by what I used to specify for a workflow,

[1]
input: group_by = 1, concurrent = True
...
[2]
input: group_by = 1, concurrent = True

now becomes

[1]
input: group_by =1 , concurrent=True
...
[2]
input: concurrent=True

I wonder where information for concurrent is saved, and if it makes sense to make it group property that can also be passed on unless otherwise specified?