'Generate an error if there are leftover members.'

def assert_no_leftovers(self):

    leftovers = []
    for name in self._members.keys():
        if ((name in self._members) and (name not in self._documented)):
            leftovers.append(name)
    if leftovers:
        raise RuntimeError(('%s:    undocumented    members:    %s' % (self._title, ',    '.join(leftovers))))
