class StrBlob {
public:
  typedef std::vector<std::string>::size_type size_type;

  StrBlob():data(std::make_shared<std::vector<std::string>>()){ }
  StrBlob(std::initializer_list<std::string> il):data(std::make_shared<std::vector<std::string>>(il)){ }

  StrBlob();
  StrBlob(std::initializer_list<std::string> il);
private:

  std::shared_ptr<std::vector<std::string>> data;

};