Method addIterator

src/main/java/net/starlark/java/eval/EvalUtils.java:27–31

(Object x)

  private EvalUtils() {}

  static void addIterator(Object x) {
    if (x instanceof Mutability.Freezable) {
      ((Mutability.Freezable) x).updateIteratorCount(+1);
    }
  }

  static void removeIterator(Object x) {
    if (x instanceof Mutability.Freezable) {