Source
void insertDtmf(String tones, [int duration, int interToneGap]) { if (interToneGap != null) { _blink.BlinkRTCDTMFSender.instance.insertDTMF_Callback_3_(this, tones, duration, interToneGap); return; } if (duration != null) { _blink.BlinkRTCDTMFSender.instance.insertDTMF_Callback_2_(this, tones, duration); return; } _blink.BlinkRTCDTMFSender.instance.insertDTMF_Callback_1_(this, tones); return; }