function getItemAtIndex(oList, iIndex) {
		var aItems = oList.getVisibleItems();
		var iRowCount = aItems.length;

		if (typeof iIndex !== 'number' || iIndex < -1) {
			iIndex = 0;
		}

		if (iIndex >= iRowCount || iIndex === -1) {
			iIndex = iRowCount - 1;
		}

		return aItems[iIndex];
	}
Requests a specified number of items from the back end to load more data in the list.
If the number of items are not specified, the <code>growingThreshold</code> value is used to request more data.

<b>Note:</b> To use this method, the <code>growing</code> feature must be enabled.

See {@link #getGrowing growing} and {@link #getGrowingThreshold growingThreshold} for more information.
@param {int} [iItems] A positive number of items to be requested
@since 1.92
@public