# version.ReleaseSuffix.patch_letter

- **Module:** version.ReleaseSuffix
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/libtmux/src/version.rs#L114
- **Page:** https://libtmux.org/en/rs/latest/reference/version-releasesuffix-patch_letter/

```
version.ReleaseSuffix.patch_letter(self) -> Option<char>
```

Return the lowercase patch letter, if this is a patch release.

## Example

```rust
use libtmux::ReleaseSuffix;

assert_eq!(ReleaseSuffix::FINAL.patch_letter(), None);
assert_eq!(ReleaseSuffix::patch('a').and_then(|value| value.patch_letter()), Some('a'));
```