def signal_once(self, *_args, **_kwargs):
        assert not self._ready, '_CallbackResult was already set'
        self._ready = True
Handle an error according to the error settings.
dataset/ETHPy150Open pika/pika/pika/adapters/blocking_connection.py/_CallbackResult.signal_once--crossover with--dataset/ETHPy150Open boakley/robotframework-workbench/rwb/lib/configobj.py/ConfigObj._handle_error