# LibTmux::FilterExpr.json_schema

- **Module:** LibTmux
- **Package:** libtmux
- **Language:** Ruby
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-ruby/blob/46474e8a2f03e39fc2b0ff73b6a841777b79c4d2/gems/libtmux/lib/libtmux/criteria.rb#L11
- **Page:** https://libtmux.org/en/ruby/v0.1.2/reference/libtmux-filterexpr-json_schema/

```
def self.json_schema: () -> ::Hash[::String, untyped]
```

Runtime validation also enforces byte, node, depth and duplicate-key limits.

Behavior contract: Criteria.