def preserve_plugin_listeners():
    if not ImportAddedPlugin.listeners:
        ImportAddedPlugin.listeners = _listeners
Ensure that a container with the given name exists;
dataset/ETHPy150Open beetbox/beets/test/test_importadded.py/preserve_plugin_listeners--crossover with--dataset/ETHPy150Open saltstack/salt/salt/states/dockerio.py/installed