[android-components](../../index.md) / [mozilla.components.service.glean.storages](../index.md) / [RecordedExperimentData](index.md) / [extra](./extra.md)

# extra

`val extra: `[`Map`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-map/index.html)`<`[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`, `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`>?` [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/service/glean/src/main/java/mozilla/components/service/glean/storages/ExperimentsStorageEngine.kt#L142)