[android-components](../../index.md) / [mozilla.components.browser.engine.system.matcher](../index.md) / [ReversibleString](index.md) / [substring](./substring.md)

# substring

`abstract fun substring(startIndex: `[`Int`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`): `[`ReversibleString`](index.md) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/browser/engine-system/src/main/java/mozilla/components/browser/engine/system/matcher/ReversibleString.kt#L21)