'Get the sibling of the current L{URLPath}.  A sibling is a file which
is in the same directory as the current file.
@param path: The path of the sibling.
@type path: L{bytes}
@param keepQuery: Whether to keep the query parameters on the returned
L{URLPath}.
@type: keepQuery: L{bool}
@return: a new L{URLPath}'

def sibling(self, path, keepQuery=False):

    return self._mod(self._url.sibling(path.decode('ascii')), keepQuery)
