[android-components](../../index.md) / [mozilla.components.feature.customtabs](../index.md) / [AbstractCustomTabsService](index.md) / [warmup](./warmup.md)

# warmup

`protected open fun warmup(flags: `[`Long`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)`): `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/feature/customtabs/src/main/java/mozilla/components/feature/customtabs/AbstractCustomTabsService.kt#L31)