if(sender != null && o != null) { other=o; return sender.equals(other.sender) && id == other.id; } return false;
if(sender != null && o != null) { other=(Gossip)o; return sender.equals(other.sender) && id == other.id; } return false;
    public boolean equals(Gossip o) {	Gossip other=null;	if(sender != null && o != null) {	    other=o;	    return sender.equals(other.sender) && id == other.id;	}	return false;    }