How to use the pathlib2.__init__._RecursiveWildcardSelector function in pathlib2

def _make_selector(pattern_parts):
    pat = pattern_parts[0]
    child_parts = pattern_parts[1:]
    if pat == '**':
        cls = _RecursiveWildcardSelector
    elif '**' in pat:
        raise ValueError(
            "Invalid pattern: '**' can only be an entire path component")
    elif _is_wildcard_pattern(pat):
        cls = _WildcardSelector
    else:
        cls = _PreciseSelector
    return cls(pat, child_parts)