toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (all != null) 'all': all!,
if (groupLabels != null) 'groupLabels': groupLabels!,
if (instanceNamePrefixes != null)
'instanceNamePrefixes': instanceNamePrefixes!,
if (instances != null) 'instances': instances!,
if (zones != null) 'zones': zones!,
};