code: def check_downloaded_files_sizes(self):
          
          for file_url in self.file_urls:
              local_path = file_url.get_local_path(self.dest_directory)
              self.check_file_size(file_url.size, local_path)
docs: Make sure the files sizes are correct. Since we manually create the files this will only catch overruns.
          Raises ValueError if there is a problematic file.