Method resize

cpp/src/arrow/util/small_vector.h:426–441

  }

  void resize(size_t n) {
    const size_t old_size = storage_.size_;
    if (n > storage_.size_) {
      storage_.bump_size(n - old_size);
      auto* p = storage_.storage_ptr();
      for (size_t i = old_size; i < n; ++i) {
        p[i].construct(T{});
      }
    } else {
      auto* p = storage_.storage_ptr();
      for (size_t i = n; i < old_size; ++i) {
        p[i].destroy();
      }
      storage_.reduce_size(old_size - n);
    }
  }

  void resize(size_t n, const T& value) {
    const size_t old_size = storage_.size_;