std::string Box_ispe::dump(Indent& indent) const
{
  std::ostringstream sstr;
  sstr << Box::dump(indent);

  sstr << indent << "image width: " << m_image_width << "\n"
       << indent << "image height: " << m_image_height << "\n";

  return sstr.str();
}
std::string Box_ispe::dump(Indent& indent) const
{
  std::ostringstream sstr;
  sstr << Box::dump(indent);

  sstr << indent << "image width: " << m_image_width << "\n"
       << indent << "image height: " << m_image_height << "\n";

  return sstr.str();
}