How to use

freeze

method

in

org.netbeans.modules.cnd.utils.cache.MapSnapshot

protected MapSnapshot(MapSnapshot<V> parent) {
  storage = EMPTY;
  assert (parent == null || parent.parent == null || !parent.parent.isEmpty()) : "how grand father could be empty " + parent;
  // optimization to prevent chaining of empty snapshots
  while (parent != null && parent.isEmpty()) {
    parent = parent.parent;
  }
  this.parent = parent;
  if (this.parent != null) {
    this.parent.freeze();
  }
}