rem: ALSA_PCM2_PLUGIN_DEVICE* clone(void) const { cerr << "Not implemented!" << endl; return this; }
add: ALSA_PCM2_PLUGIN_DEVICE* clone(void) const { cerr << "Not implemented!" << endl; return 0; }
context:   ALSA_PCM2_PLUGIN_DEVICE* clone(void) const { cerr << "Not implemented!" << endl; return this; }