toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (driveFile != null) 'driveFile': driveFile!,
if (form != null) 'form': form!,
if (link != null) 'link': link!,
if (youTubeVideo != null) 'youTubeVideo': youTubeVideo!,
};