Function feGetCellValue

feGetCellValue(
    page: FETablePage,
    tableId: string,
    rowIndex: number,
    columnName: string,
): Promise<string>
Gets the text value of a cell in a UI5 table at the given row index and column name.
Parameters
- page: FETablePage
  Playwright Page (or compatible subset).
- tableId: string
  The UI5 control ID of the table.
- rowIndex: number
  Zero-based row index.
- columnName: string
  The column header text to match.
Returns Promise<string>
The text content of the cell.
Remarks
Looks up the column index by matching header text, then reads the cell value. For responsive tables, uses getItems()[row].getCells()[col]. For grid tables, uses getRows()[row].getCells()[col].

Throws
ControlError with ERR_CONTROL_AGGREGATION if the column is not found or index is out of bounds.
Example
```
const value = await feGetCellValue(page, 'myApp--productTable', 0, 'Product Name');
```
- Defined in fe/fe-table-helpers.ts:142