toJson method
Implementation
Map toJson(){
Map result = {};
if (fileReference != null) result.addAll({"fileReference": fileReference});
if (version != null) result.addAll({"version": version});
if (objectType != null) result.addAll({"objectType": objectType});
if (notifications != null) result.addAll({"notifications": notifications});
if (signerInfos != null) result.addAll({"signerInfos": signerInfos});
return result;
}