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;
}