# version.TmuxVersion.is_development

- **Module:** version.TmuxVersion
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/f0e37052c232636b61d095817046e6bfc8f2ca40/crates/libtmux/src/version.rs#L411
- **Page:** https://libtmux.org/en/rs/latest/reference/version-tmuxversion-is_development/

```
version.TmuxVersion.is_development(self) -> bool
```

Return whether this is a development identifier.

## Example

```rust
use libtmux::TmuxVersion;

let version = TmuxVersion::parse_output(b"tmux master\n")?;
assert!(version.is_development());
```