Function getControlAggregation

getControlAggregation(
    page: MatcherPage,
    controlId: string,
    aggregationName: string,
): Promise<readonly BridgeControlRef[]>
Retrieves a control aggregation via page.evaluate() using the bridge.
Parameters
- page: MatcherPage
  The page (or minimal MatcherPage) to evaluate on.
- controlId: string
  The ID of the UI5 control.
- aggregationName: string
  The aggregation to read (e.g., 'items', 'cells').
Returns Promise<readonly BridgeControlRef[]>
An array of control references from the browser context.
Intent
Read an aggregation (child controls) from a UI5 control for table/list assertions.

Capability
matchers.getControlAggregation

Guarantee
Returns an array of BridgeControlRef objects (empty array if no items in aggregation).

Remarks
Ensures the bridge is injected, then executes the getter method for the given aggregation on the target control. Returns an array of BridgeControlRef objects.
Example
```
const rows = await getControlAggregation(page, 'table1', 'items');
```
- Defined in matchers/matcher-utils.ts:149