toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (document != null) 'document': document!,
if (done != null) 'done': done!,
if (readTime != null) 'readTime': readTime!,
if (skippedResults != null) 'skippedResults': skippedResults!,
if (transaction != null) 'transaction': transaction!,
};