code: public synchronized void open(ObjectManagerState objectManagerState)
                      throws ObjectManagerException {
          final String methodName = "open";
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this, cclass, methodName, new Object[] { objectManagerState });
  
          super.open(objectManagerState);
          usesSerializedForm = false;
  
          // Lock all ManagedObjects into memory.
          inMemoryManagedObjects = new ConcurrentHashMap(concurrency);
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this, cclass, methodName);
      }
docs: Establish the transient state of this ObjectStore.
  
  @param objectManagerState with which the ObjectStore is registered.
  @throws ObjectManagerException