// The following blocks until all child CASes acquire their Flow objects from the Flow
// Controller. Release the semaphore immediately after acquiring it. This semaphore is
// no longer needed. This synchronization is only necessary for blocking the parent
// CAS until all child CASes acquire their Flow objects.
casStateEntry.acquireFlowSemaphore();
casStateEntry.releaseFlowSemaphore();
if ( lastDelegateEndpoint.processParentLast()) {
synchronized (super.finalStepMux) {
// Determine if the CAS should be held until all its children leave this aggregate.
if (casStateEntry.getSubordinateCasInPlayCount() > 0) {
// This input CAS has child CASes still in play. It will remain in the cache