'Returns the user ID of the file\'s owner.
@raise NotImplementedError: if the platform is Windows, since the UID
is always 0 on Windows
@return: the user ID of the file\'s owner
@rtype: L{int}
@since: 11.0'

def getUserID(self):

    if platform.isWindows():
        raise NotImplementedError
    st = self._statinfo
    if (not st):
        self.restat()
        st = self._statinfo
    return st.st_uid
