code: func (c *Client) SendWebRTCRequest(req *protocol.WebRTCSignalMessage) error {
  	timeout := time.Duration(0)
  	if c.Config != nil {
  		timeout = c.Config.Timeout
  	}
  	_, err := c.TellWithTimeout(WebRTCHandlerName, timeout, req)
  	return err
  }
docs: // SendWebRTCRequest sends requests to kontrol for signalling purposes.