text: #ifndef SORA_RTC_MESSAGE_SENDER_H_
  #define SORA_RTC_MESSAGE_SENDER_H_
  
  #include <string>
  
  // WebRTC
  #include <api/peer_connection_interface.h>
  
  namespace sora {
  
  class RTCMessageSender {
   public:
    virtual void OnIceConnectionStateChange(
        webrtc::PeerConnectionInterface::IceConnectionState new_state) = 0;
    virtual void OnIceCandidate(const std::string sdp_mid,
                                const int sdp_mlineindex,
                                const std::string sdp) = 0;
  };
  
  }  // namespace sora
  
  #endif
  