public K getKey() {
return entry != null ? entry.getKey(position) : null;
}
public V getValue() {
return entry != null ? entry.getValue(position) : null;
}
public void assign(final OMVRBTreeEntry<K, V> entry) {
this.entry = entry;
this.position = entry != null ? entry.getTree().getPageIndex() : -1;
}