}

        fun isSystemPropertyLoaded(key: String): Boolean {
            return mutatedSystemProperties[key] is SystemPropertyLoad
        }

        fun getLoadedPropertyOldValue(key: String): Any? {
            return (mutatedSystemProperties[key] as? SystemPropertyLoad)?.oldValue
        }

        fun getCachedState(): CachedEnvironmentState {
            return CachedEnvironmentState(

                    ConfigurationCacheEnvironmentChangeTracker.SystemPropertyMutate(key, value, PropertyTrace.Unknown)
                ConfigurationCacheEnvironmentChangeTracker.SystemPropertyLoad::class.java ->
                    ConfigurationCacheEnvironmentChangeTracker.SystemPropertyLoad(key, value, null)
                else -> throw IllegalStateException("$clazz instances is not expected to be stored")
            }
        }