*/
  private boolean cleanUp(Reference<?> firstReference) {
    Method finalizeReferentMethod = getFinalizeReferentMethod();
    if (finalizeReferentMethod == null) {
      return false;
    }

    if (!finalizeReference(firstReference, finalizeReferentMethod)) {
      return false;
    }

    /*
     * Loop as long as we have references available so as not to waste CPU looking up the Method
     * over and over again.