public void merge(Object mergeObject) { if (mergeObject == null)
public void merge(SIPHeaderList mergeHdrList) { if (mergeHdrList == null)
	public void merge(Object mergeObject) {		if (mergeObject == null)			return;		if (!mergeObject.getClass().equals(this.getClass()))			throw new IllegalArgumentException("Bad class " + this.getClass());		SIPHeaderList mergeHdrList = (SIPHeaderList) mergeObject;		hlist.mergeObjects(mergeHdrList.hlist);	}