@Override
  public Tuple2<T1, T2> getOrDefault(Tuple2<T1, T2> defaultValue) throws PromiseUnresolvedException {
    return _task.getOrDefault(defaultValue);
  }
@Override
  public Tuple2<T1, T2> getOrDefault(Tuple2<T1, T2> defaultValue) throws PromiseUnresolvedException {
    return _task.getOrDefault(defaultValue);
  }
@ Override public Tuple2 < T1 , T2 > getOrDefault ( Tuple2 < T1 , T2 > defaultValue ) throws PromiseUnresolvedException { return _task . getOrDefault ( defaultValue ) ; }
{@inheritDoc}
{