docs: public ObjectEnvelope get(Identity oid, Object pKey, boolean isNew)
      {
          ObjectEnvelope result = getByIdentity(oid);
          if(result == null)
          {
              result = new ObjectEnvelope(this, oid, pKey, isNew);
              mhtObjectEnvelopes.put(oid, result);
              mvOrderOfIds.add(oid);
              if(log.isDebugEnabled())
                  log.debug("register: " + result);
          }
          return result;
      }