@Override
final void startRead() {
super.startRead();
if (_writes == null || _writes.length < resources().size())
_writes = new Version[resources().size()][];
}
@Override
void clean() {
super.clean();
if (_writes != null) for (int i = 0; i < _writes.length; i++) _writes[i] = null;
_happenedBefore = null;
_dependencies = null;
_versions = null;
}
@Override
void addThreadContextObjects(List<Object> list) {
super.addThreadContextObjects(list);
list.add(_visitor);
}