How to use the yarl.quoting._Unquoter function in yarl

@pytest.fixture(params=[_PyUnquoter, _Unquoter], ids=["py_unquoter", "c_unquoter"])
def unquoter(request):
    return request.param

# URI-reference = URI / relative-ref
    # relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
    # relative-part = "//" authority path-abempty
    #               / path-absolute
    #               / path-noscheme
    #               / path-empty
    # absolute-URI  = scheme ":" hier-part [ "?" query ]
    __slots__ = ("_cache", "_val")

    _QUOTER = _Quoter()
    _PATH_QUOTER = _Quoter(safe="@:", protected="/+")
    _QUERY_QUOTER = _Quoter(safe="?/:@", protected="=+&;", qs=True)
    _QUERY_PART_QUOTER = _Quoter(safe="?/:@", qs=True)
    _FRAGMENT_QUOTER = _Quoter(safe="?/:@")

    _UNQUOTER = _Unquoter()
    _PATH_UNQUOTER = _Unquoter(unsafe="+")
    _QS_UNQUOTER = _Unquoter(qs=True)

    def __new__(cls, val="", *, encoded=False, strict=None):
        if strict is not None:  # pragma: no cover
            warnings.warn("strict parameter is ignored")
        if type(val) is cls:
            return val
        if type(val) is str:
            val = urlsplit(val)
        elif type(val) is SplitResult:
            if not encoded:
                raise ValueError("Cannot apply decoding to SplitResult")
        elif isinstance(val, str):
            val = urlsplit(str(val))
        else:

# relative-part = "//" authority path-abempty
    #               / path-absolute
    #               / path-noscheme
    #               / path-empty
    # absolute-URI  = scheme ":" hier-part [ "?" query ]
    __slots__ = ("_cache", "_val")

    _QUOTER = _Quoter()
    _PATH_QUOTER = _Quoter(safe="@:", protected="/+")
    _QUERY_QUOTER = _Quoter(safe="?/:@", protected="=+&;", qs=True)
    _QUERY_PART_QUOTER = _Quoter(safe="?/:@", qs=True)
    _FRAGMENT_QUOTER = _Quoter(safe="?/:@")

    _UNQUOTER = _Unquoter()
    _PATH_UNQUOTER = _Unquoter(unsafe="+")
    _QS_UNQUOTER = _Unquoter(qs=True)

    def __new__(cls, val="", *, encoded=False, strict=None):
        if strict is not None:  # pragma: no cover
            warnings.warn("strict parameter is ignored")
        if type(val) is cls:
            return val
        if type(val) is str:
            val = urlsplit(val)
        elif type(val) is SplitResult:
            if not encoded:
                raise ValueError("Cannot apply decoding to SplitResult")
        elif isinstance(val, str):
            val = urlsplit(str(val))
        else:
            raise TypeError("Constructor parameter should be str")

# relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
    # relative-part = "//" authority path-abempty
    #               / path-absolute
    #               / path-noscheme
    #               / path-empty
    # absolute-URI  = scheme ":" hier-part [ "?" query ]
    __slots__ = ("_cache", "_val")

    _QUOTER = _Quoter()
    _PATH_QUOTER = _Quoter(safe="@:", protected="/+")
    _QUERY_QUOTER = _Quoter(safe="?/:@", protected="=+&;", qs=True)
    _QUERY_PART_QUOTER = _Quoter(safe="?/:@", qs=True)
    _FRAGMENT_QUOTER = _Quoter(safe="?/:@")

    _UNQUOTER = _Unquoter()
    _PATH_UNQUOTER = _Unquoter(unsafe="+")
    _QS_UNQUOTER = _Unquoter(qs=True)

    def __new__(cls, val="", *, encoded=False, strict=None):
        if strict is not None:  # pragma: no cover
            warnings.warn("strict parameter is ignored")
        if type(val) is cls:
            return val
        if type(val) is str:
            val = urlsplit(val)
        elif type(val) is SplitResult:
            if not encoded:
                raise ValueError("Cannot apply decoding to SplitResult")
        elif isinstance(val, str):
            val = urlsplit(str(val))
        else:
            raise TypeError("Constructor parameter should be str")