text: #include "mydata.hh"
  
  #include <ostream>
  #include <string>
  
  using namespace std;
  
  MyData::~MyData()
  {
  }
  
  string MyData::ToString() const
  {
      return "{ /* MyData */ }"s;
  }
  
  MyData &MyData::operator=(const MyData &other)
  {
      return *this;
  }
  
  ostream &operator<<(ostream &os, const MyData &data)
  {
      os << data.ToString();
      return os;
  }
  