Method Union

Filters/Parallel/vtkCleanArrays.cxx:157–171

    }
  }
  void Union(const vtkArraySet& other)
  {
    if (this->Valid && other.Valid)
    {
      vtkCleanArrays::vtkArraySet setC;
      std::set_union(
        this->begin(), this->end(), other.begin(), other.end(), std::inserter(setC, setC.begin()));
      setC.MarkValid();
      this->swap(setC);
    }
    else if (other.Valid)
    {
      *this = other;
    }
  }

  // Fill up \c this with arrays from \c dsa
  void Initialize(vtkFieldData* dsa)