code: def AddSymbolicLink(self, path, linked_path):
      
      if self.file_system.FileEntryExistsByPath(path):
        raise ValueError('Path: {0:s} already set.'.format(path))
  
      self._AddParentDirectories(path)
      self.file_system.AddFileEntry(
          path, file_entry_type=definitions.FILE_ENTRY_TYPE_LINK,
          link_data=linked_path)
docs: Adds a symbolic link to the fake file system.
  
      Args:
        path (str): path of the symbolic link within the fake file system.
        linked_path (str): path that is linked.
  
      Raises:
        ValueError: if the path is already set.