Base::getParamsStructure

public function getParamsStructure();

/**
 * @param string $paramKey
 * @param string $inputName
 * @return string Html
 * @throws BitrixMainSystemException
 */
public function getEditHtml($paramKey, $inputName)
{
	$paramsStructure = $this->getParamsStructure();

	return BitrixSaleInternalsInputManager::getEditHtml(
		$inputName,
		$paramsStructure[$paramKey],
		$this->params[$paramKey] ?? null
	);
}