# tmux_filter:requirements/1

- **Package:** libtmux_erlang
- **Language:** Erlang
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-erlang/blob/d1b6308440cf9eb8f6647e7ae434bce60e849368/apps/libtmux_erlang/src/tmux_filter.erl#L161
- **Page:** https://libtmux.org/en/erlang/latest/reference/tmux_filter-requirements-1/

```
requirements/1
-spec requirements(t()) -> [tmux_snapshot:requirement()].
```

Derive every field and complete relationship needed for faithful evaluation. The complete requirement set is checked before short-circuiting any row.

## Parameters

- `Argument1` (`t()`)