Dart APIunself_monitoringInfoServiceanalyticId analyticId property Null safety String? analyticId Implementation String? get analyticId => _analytic!.context?.anonymousId; unself_monitoring unself_monitoring InfoService analyticId property InfoService class Constructors InfoService Properties analyticId appName buildNumber buildSignature hashCode installerStore packageName runtimeType version Methods noSuchMethod toString Operators operator == Static properties package