Avoid unnecessary save document in ProxySubscriptionPropagationListener

        List<String> replacedProxyIds = (List<String>) ctx.getProperties().get(CoreEventConstants.REPLACED_PROXY_IDS);
        if (replacedProxyIds == null) {
            return;
        }        for (String replacedProxyId : replacedProxyIds) {
            // there should be only one replaced proxy, but just in case,
            // iterate over them
            DocumentModel fromDoc = ctx.getCoreSession().getDocument(new IdRef(replacedProxyId));
            fromDoc.getAdapter(SubscriptionAdapter.class).copySubscriptionsTo(publishedDoc);
        }
        ctx.getCoreSession().saveDocument(publishedDoc);