toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (lang != null) 'lang': lang!,
if (previewImageUrl != null) 'previewImageUrl': previewImageUrl!,
if (snippet != null) 'snippet': snippet!,
if (snippetUrl != null) 'snippetUrl': snippetUrl!,
if (title != null) 'title': title!,
};