toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (existingDisk != null) 'existingDisk': existingDisk!,
if (nfsMount != null) 'nfsMount': nfsMount!,
if (persistentDisk != null) 'persistentDisk': persistentDisk!,
if (volume != null) 'volume': volume!,
};