toJson method
Implementation
@override
Map<String, dynamic> toJson() => <String, dynamic>{
'daily_free_query_count': dailyFreeQueryCount,
'remaining_free_query_count': remainingFreeQueryCount,
'next_free_query_in': nextFreeQueryIn,
'star_count': starCount,
'is_current_query_free': isCurrentQueryFree,
'@type': constructor,
};