toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (byteRange != null) 'byteRange': byteRange!,
if (codepointRange != null) 'codepointRange': codepointRange!,
if (container != null) 'container': container!,
if (contentLocations != null) 'contentLocations': contentLocations!,
};