protected void dialbackError(String from, String to, PacketError err) {
        connection.deliverRawText("<db:result type=\"error\" from=\"" + from + "\" to=\"" + to + "\">" + err.toXML() + "</db:result>");
    }
Send a dialback error.

@param from From
@param to To
@param err Error type.
xmppserver/src/main/java/org/jivesoftware/openfire/server/ServerDialback.java