58   void SetMandatory(const std::string& key, const T& value) {  in SetMandatory()  function
78     SetMandatory(MediaConstraintsInterface::kMinAspectRatio, ratio);  in SetMandatoryMinAspectRatio()
82     SetMandatory(MediaConstraintsInterface::kMinWidth, width);  in SetMandatoryMinWidth()
86     SetMandatory(MediaConstraintsInterface::kMinHeight, height);  in SetMandatoryMinHeight()
94     SetMandatory(MediaConstraintsInterface::kMaxFrameRate, frame_rate);  in SetMandatoryMaxFrameRate()
98     SetMandatory(MediaConstraintsInterface::kOfferToReceiveAudio, enable);  in SetMandatoryReceiveAudio()
102     SetMandatory(MediaConstraintsInterface::kOfferToReceiveVideo, enable);  in SetMandatoryReceiveVideo()
106     SetMandatory(MediaConstraintsInterface::kUseRtpMux, enable);  in SetMandatoryUseRtpMux()
110     SetMandatory(MediaConstraintsInterface::kIceRestart, enable);  in SetMandatoryIceRestart()
114     SetMandatory(MediaConstraintsInterface::kEnableRtpDataChannels, true);  in SetAllowRtpDataChannels()
115     SetMandatory(MediaConstraintsInterface::kEnableDtlsSrtp, false);  in SetAllowRtpDataChannels()
123     SetMandatory(MediaConstraintsInterface::kEnableDtlsSrtp, true);  in SetAllowDtlsSctpDataChannels()