# io.github.libtmux.kotlin.Server.sessionOrNull

- **Module:** io.github.libtmux.kotlin
- **Package:** io.github.libtmux:libtmux-kotlin
- **Language:** Kotlin
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-java/blob/f56392b5d9bc7f1f9c1631842333fb90f3d82d40/libtmux-kotlin/src/main/kotlin/io/github/libtmux/kotlin/Server.kt#L102
- **Page:** https://libtmux.org/en/kotlin/latest/reference/io-github-libtmux-kotlin-server-sessionornull/

```
public suspend fun sessionOrNull(expression: FilterExpr<JavaSession>): Session?
```

The one session this expression matches, or null when none does.

## Parameters

- `expression` (`FilterExpr<JavaSession>`)