toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (mostRecentStartPosition != null)
'mostRecentStartPosition': mostRecentStartPosition!,
if (nextAvailableStartPosition != null)
'nextAvailableStartPosition': nextAvailableStartPosition!,
if (specificStartPosition != null)
'specificStartPosition': specificStartPosition!,
};