This activity allows to retrieve the assignable security identities of a Gantt / GanttTask
The orchestrator object represents the connection to a DocsMarshal installation.
If valorized and the GanttTask has resource requirements, the activity will filter the result
Default null. This property is useful if the Gantt uses an Organization Chart as its resource management method because you can give the user id to impersonate to retrieve the data as if the given user would perform this search