toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (dialedNumber != null) 'dialedNumber': dialedNumber!,
if (extraMimeContents != null) 'extraMimeContents': extraMimeContents!,
if (sdp != null) 'sdp': sdp!,
if (sipHeaders != null) 'sipHeaders': sipHeaders!,
};