# formats.EmptyPolicy.Required

- **Module:** formats.EmptyPolicy
- **Package:** libtmux
- **Language:** Rust
- **Kind:** constant
- **Source:** https://github.com/libtmux/libtmux-rs/blob/8a648c0894dfffc9303583f753b6c8ae01f2fe76/crates/libtmux/src/formats.rs#L188
- **Page:** https://libtmux.org/reference/rs/formats-emptypolicy-required/

Reject an empty field.