• pb_playback_t : playback.h
• pb_req_t : playback.h
• PBBluetoothCb : playback.h
• PBMuteCb : playback.h
• PBPrivacyCb : playback.h
• PBStateHint : playback.h
• PBStateReply : playback.h
• PBStateRequest : playback.h