private static IEnumerable <string> GetInboundActivityPathInternal(this WorkflowModel workflowModel, string activityId, HashSet <string> inspectedActivityIds)
{
foreach (var connection in workflowModel.GetInboundConnections(activityId))
{
// Circuit breaker: Detect workflows that implement repeating flows to prevent an infinite loop here.
if (inspectedActivityIds.Contains(connection.SourceId))
{
yield break;
}
yield return(connection.SourceId);
foreach (var parentActivityId in workflowModel.GetInboundActivityPathInternal(connection.SourceId, inspectedActivityIds).Distinct())
{
inspectedActivityIds.Add(parentActivityId);
yield return(parentActivityId);
}
}
}