toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (create != null) 'create': create!,
if (drop != null) 'drop': drop!,
if (id != null) 'id': id!,
if (update != null) 'update': update!,
if (updateMask != null) 'updateMask': updateMask!,
};