toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (cause != null) 'cause': cause!,
if (readTime != null) 'readTime': readTime!,
if (resumeToken != null) 'resumeToken': resumeToken!,
if (targetChangeType != null) 'targetChangeType': targetChangeType!,
if (targetIds != null) 'targetIds': targetIds!,
};