def METHOD_NAME(self, signal_symbol: str, slot: Callable, use_symbol: bool):
    """Remove one slot for signal.
    If slot is not connected, this does nothing.
    """
    signal_connector = self._get_or_create_sc(signal_symbol)
    if use_symbol is True:
        signal_connector.disconnect_slot_symbol(fuoexec_S(slot))
    else:
        signal_connector.disconnect_slot(slot)