code: public final void append(final AbstractItemLink link) throws SevereMessageStoreException
      {
          if (link.isItemStreamLink())
          {
              _itemStreams.append(link);
          }
          else
          {
              throw new SevereMessageStoreException("Cannot add this directly to message store");
          }
      }
docs: /* (non-Javadoc)
  @see com.ibm.ws.sib.msgstore.impl.StreamLink#append(com.ibm.ws.sib.msgstore.impl.AbstractItemLink)
  Used by AddTask to really attach the link.  Overridden here to catch itemStreams and
  referenceStreams