in Swift/KVSiOSApp/ChannelConfigurationViewController.swift [338:349]
func signalClient(_: SignalingClient, senderClientId: String, didReceiveRemoteSdp sdp: RTCSessionDescription) {
print("Received remote sdp from [\(senderClientId)]")
if !senderClientId.isEmpty {
remoteSenderClientId = senderClientId
}
setRemoteSenderClientId()
webRTCClient!.set(remoteSdp: sdp, clientId: senderClientId) { _ in
print("Setting remote sdp and sending answer.")
self.vc!.sendAnswer(recipientClientID: self.remoteSenderClientId!)
}
}