Function getFilterValue

getFilterValue(
    page: TableFilterSortPage,
    tableId: string,
    columnIndex: number,
): Promise<string | null>
Returns the current filter value of a table column.
Parameters
- page: TableFilterSortPage
  Playwright Page (or compatible subset).
- tableId: string
  The UI5 control ID.
- columnIndex: number
  Zero-based column index.
Returns Promise<string | null>
Filter value string, or null if the column is not filtered.
Example
```
const filter = await getFilterValue(page, 'myTable', 0);
```
- Defined in modules/table-filter-sort.ts:231