ISystemFilterPoolReferenceManager.getSystemFilterReferences(
ISubSystem subSystem)
Concatenate all filter references from all filter pools we reference, into one
big list.
ISystemFilterPoolReferenceManager.getSystemFilterReferencePosition(
ISystemFilterReference filterRef)
Given a filter reference, return its position within this reference manager
when you think of all filter references from all filter pool references as
being concatenated
ISystemTree.revealAndExpand(
ISubSystem parentSubSystem,
ISystemFilter filter)
Expand a given filter, given a subsystem that contains a reference to the filter's pool.