question

You can use the groupnummembers() and groupmember() commands along with a Sub Flow, where the Sub Flow uses a Custom Code activity that in turn utilizes the Stop Object picklist option. All you would need is the name of the group since both activities reference a group by name.

You can look at the attached model (groups-stopobject-example.fsm) as an example. I use an Assign Labels activity to keep track of the name of the group (called Operators) on a token label (called groupName). In both Run Sub Flow activities, I use the groupName label with the groupnummembers() command to determine the quantity of child tokens to create in the Sub Flow. I also create a label on each child token called rank where each child token's rank should match up with a member of the group (the first child token should reference the first Operator in the group, the second child token with the second Operator, etc.).

In the first Sub Flow, the Stop Object picklist is used. The groupmember() command references which member of the group to stop using the groupName label and the rank label. The second Sub Flow uses the Resume Object picklist option, but the same command and labels are used with it.

So a parent token is created every time a flowitem enters the Processor. That parent token kicks off the Stop Object Sub Flow to stop all Operators in the Operators group. Then a Wait for Event activity waits until the flowitem leaves the Processor before the parent token kicks off the Resume Object Sub Flow to resume all Operators in the group.