code: def _tools_classpath_pairs(self, dest_dir):
      
      tools_classpath = self._tools_classpath
      return [(entry, os.path.join(dest_dir, '{}-{}'.format(idx, os.path.basename(entry))))
              for idx, entry in enumerate(tools_classpath)]
docs: Given a destination directory, returns a list of tuples of (src, dst) symlink pairs.