old_contents: # Metadata
  from .metadata import __version__
  
  # Functions
  from .util import logger
  
  # Classes
  from .application import Application
  # from .downloads import Downloads
  # from .ghtorrent import GHTorrent
  # from .ghtorrentplus import GHTorrentPlus
  # from .git import Git
  # from .githubapi import GitHubAPI
  # from .librariesio import LibrariesIO
  # from .localcsv import LocalCSV
  # from .publicwww import PublicWWW
  # from .server import Server
  
new_contents: # Metadata
  from .metadata import __version__
  
  # Functions
  from .util import logger
  
  # Classes
  from .application import Application
  
  def data_sources():
      from .downloads import Downloads
      from .ghtorrent import GHTorrent
      from .ghtorrentplus import GHTorrentPlus
      from .git import Git
      from .githubapi import GitHubAPI
      from .librariesio import LibrariesIO
      from .localcsv import LocalCSV
      from .publicwww import PublicWWW
      from .server import Server
      return [Downloads, GHTorrent, GHTorrentPlus, Git, GitHubAPI, LibrariesIO, LocalCSV, PublicWWW, Server]
  
subject: Add data_sources function