toJson method Null safety

Map<String, dynamic> toJson()

Implementation

core.Map<core.String, core.dynamic> toJson() => {
      if (bestGuess != null) 'bestGuess': bestGuess!,
      if (fromBytes != null) 'fromBytes': fromBytes!,
      if (fromFileName != null) 'fromFileName': fromFileName!,
      if (fromHeader != null) 'fromHeader': fromHeader!,
      if (fromUrlPath != null) 'fromUrlPath': fromUrlPath!,
    };