Как получать вариации товара через API Битрикс24?

Я вытащил через метод каталога. TYPE брать из метода crm.
TYPE = 1 - простой товар
TYPE = 4 - торговое предложение

$response = $this->client->bxExecuteBatch([
  'productrows' => [
    'method' => 'crm.deal.productrows.get',
    'params' => [
      'id' => $crm_deal_id,
    ],
  ],
]);

$productrows = $response['result']['result']['productrows'];

$request = [];
foreach ($productrows as $row) {
  if (1 == $row['TYPE']) { // простой товар
    $request["product_{$row['PRODUCT_ID']}"] = [
      'method' => 'crm.product.get',
      'params' => [
        'id' => $row['PRODUCT_ID'],
      ],
    ];
  } elseif (4 == $row['TYPE']) { // торговое предложение
    $request["offer_{$row['PRODUCT_ID']}"] = [
      'method' => 'catalog.product.offer.get',
      'params' => [
        'id' => $row['PRODUCT_ID'],
      ],
    ];
    $request["product_{$row['PRODUCT_ID']}"] = [
      'method' => 'crm.product.get',
      'params' => [
        'id' => '$result[offer_' . $row['PRODUCT_ID'] . '][offer][parentId][value]',
      ],
    ];
  } else {
    throw new Exception('unexpected product row TYPE');
  }
}
$response = $this->client->bxExecuteBatch($request);