text: #pragma once
  
  #include <cstdint>
  #include <string>
  
  namespace downloader
  {
  std::string GetFileDownloadUrl(std::string const & fileName, int64_t dataVersion, uint64_t diffVersion = 0);
  bool IsUrlSupported(std::string const & url);
  std::string GetFilePathByUrl(std::string const & url);
  }  // namespace downloader
  
  