# NestedPaths

> _Since v3.3.0_

Strict, opt-in union of every valid nested dotted path through `TRow`.

Descends through plain object properties only — it deliberately stops at
arrays, `Date`, `RegExp`, and functions (which are leaf values for grid
purposes) and is depth-capped to avoid `TS2589` ("excessively deep") on
self-referential / tree row shapes.

Plug it into a column/grid via the `TField` generic to get typo-checking on
the full path instead of only the root key:

```typescript
const config: GridConfig<Deal, NestedPaths<Deal>> = { columns: [...] };
```

```ts
type NestedPaths = unknown
```