Grid::createColumns

protected function createColumns(): Columns;

/**
 * Create rows collection.
 *
 * @return Rows
 */
protected function createRows(): Rows
{
	$emptyRowAssembler = new EmptyRowAssembler(
		$this->getVisibleColumnsIds()
	);

	return new Rows(
		$emptyRowAssembler
	);
}