def METHOD_NAME(self):
    """Connect all slots.
    """
    if self._signal is None:
        raise RuntimeError("no signal is bound")
    # Connect slot which are not symbol.
    # These slots are connected directly.
    for slot, kwargs in self._slot_list:
        self._signal.METHOD_NAME(slot, **kwargs)
    self._slot_list.clear()
    # Connect slots which are symbol currently.
    self._signal.METHOD_NAME(self.slot_symbols_delegate, weak=False)