+ (RTCSignalingState)convertSignalingStateToObjC:
(webrtc::PeerConnectionInterface::SignalingState)nativeState;
++ (webrtc::PeerConnectionInterface::StatsOutputLevel)
+ convertStatsOutputLevelToNative:(RTCStatsOutputLevel)statsOutputLevel;
+
+ (RTCSourceState)convertSourceStateToObjC:
(webrtc::MediaSourceInterface::SourceState)nativeState;