if(log.isInfoEnabled()) log.info("merge was cancelled (merge_id=" + merge_id + ")");
if(log.isDebugEnabled()) log.debug("merge was cancelled (merge_id=" + merge_id + ")");
    public void handleMergeCancelled(Object merge_id) {        if(merge_id != null                && this.merge_id != null                && this.merge_id.equals(merge_id)) {                if(log.isInfoEnabled()) log.info("merge was cancelled (merge_id=" + merge_id + ")");            this.merge_id=null;            merging=false;        }    }