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?>{
'pass': pass,
'shader': shader,
'block': block,
'members': _membersToJson(members, blob),
};