[android-components](../../index.md) / [mozilla.components.support.utils](../index.md) / [ThreadUtils](index.md) / [assertOnUiThread](./assert-on-ui-thread.md)

# assertOnUiThread

`fun assertOnUiThread(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/support/utils/src/main/java/mozilla/components/support/utils/ThreadUtils.kt#L48)