if (std::fwrite(&(this->numberOfTexts), sizeof(unsigned), 1, file) != 1)
throw std::runtime_error("CSA::Save(): file write error (numberOfTexts).");
if (std::fwrite(&(this->numberOfAllTexts), sizeof(unsigned), 1, file) != 1)
if (std::fwrite(&(this->numberOfTexts), sizeof(unsigned), 1, file) != 1)
throw std::runtime_error("CSA::Save(): file write error (numberOfTexts).");
if (std::fwrite(&(this->numberOfAllTexts), sizeof(unsigned), 1, file) != 1)