const ContextualLogging … const contextualLoggingDefault … const LoggingAlphaOptions … const LoggingBetaOptions … const LoggingStableOptions … func featureGates() map[featuregate.Feature]featuregate.FeatureSpec { … } // AddFeatureGates adds all feature gates used by this package. func AddFeatureGates(mutableFeatureGate featuregate.MutableFeatureGate) error { … }