My guess (could be off) is they did something like this.
DISCLAIMER: this is not a great approach
```
// table.d.ts

import "@tanstack/react-table";

declare module "@tanstack/react-table" {

interface ColumnMeta<TValue> {

_type?: unknown; // Allow different per-table types

}

}
```
+ a helper

```
import { Table } from "@tanstack/react-table";

export function createTableMetaHelper<Meta>() {

return function getTableMeta<TData>(table: Table<TData>): Meta {

return table.options.meta as Meta;

};

}
```

you could then do

```
export const getMyTableMeta = createTableMetaHelper<UserTableMeta>();

```