# LibTmux::Query::Plan::Plan.source-filter

- **Module:** LibTmux::Query::Plan
- **Package:** LibTmux
- **Language:** Raku
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-raku/blob/0b5dd3d32e20f83a0069874e33eab0eb48f55962/lib/LibTmux/Query/Plan.rakumod#L181
- **Page:** https://libtmux.org/en/raku/latest/reference/libtmux-query-plan-plan-source-filter/

Actual candidate FORMAT restriction, or empty when source work is deferred.

Actual candidate FORMAT restriction, or empty when source work is deferred.