toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (excludedFields != null) 'excludedFields': excludedFields!,
if (includedFields != null) 'includedFields': includedFields!,
if (instanceType != null) 'instanceType': instanceType!,
if (keyField != null) 'keyField': keyField!,
};