connectedActivities expression

In an error handling scenario, it can be useful to connect the activities that needs error handling to an error handling activity. The error handling activity can then send information to the team that they need to take action.

It would be great to have an expression that takes all the activities that are connected to the error handling activity and then grab any error message from any of these activities.

The name of the expression could be connectedActivities or predecessorActivities or something similar.