toJson method
Returns the event as the JSON object a trace file holds, without its
kind key, with every byte payload handed to blob and written as
the reference it returns.
Implementation
@override
Map<String, Object?> toJson(TraceBlobWriter blob) => <String, Object?>{
'id': id,
'bytes': blob.add(bytes),
'hostReadable': hostReadable,
if (indices != null) 'indices': indices,
};