public void clear() {
synchronized(members) {
members.clear();
}
}
<BUG>public void set(Collection v) {
</BUG>
clear();
if(v != null) {
add(v);

public void clear() {
synchronized(members) {
members.clear();
}
}
public void set(Collection<Address> v) {
clear();
if(v != null) {
add(v);
