[android-components](../../index.md) / [mozilla.components.browser.engine.gecko.glean](../index.md) / [GeckoAdapter](index.md) / [onHistogram](./on-histogram.md)

# onHistogram

`fun onHistogram(metric: <ERROR CLASS>): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/engine-gecko-beta/src/main/java/mozilla/components/browser/engine/gecko/glean/GeckoAdapter.kt#L25)