code: def _ListDir(dirpath, pathtype):
    
    pathspec = rdf_paths.PathSpec(path=dirpath, pathtype=pathtype)
    childpaths = []
    try:
      file_obj = vfs.VFSOpen(pathspec)
      for path in file_obj.ListNames():
        # For Windows registry, ignore the empty string which corresponds to the
        # default value in the current key. Otherwise, globbing a key will yield
        # the key itself, because joining the name of the default value u"" with
        # a key name yields the key name again.
        if pathtype != rdf_paths.PathSpec.PathType.REGISTRY or path:
          childpaths.append(path)
    except IOError:
      pass
  
    return childpaths
docs: Returns children of a given directory.
  
    This function is intended to be used by the `PathComponent` subclasses to get
    initial list of potential children that then need to be filtered according to
    the rules of a specific component.
  
    Args:
      dirpath: A path to the directory.
      pathtype: The pathtype to use.
  
    Raises:
      ValueError: in case of unsupported path types.