GridVariationForm::getShowedValues

private function getShowedValues(bool $allowDefaultValues = true): array
{
	if (!self::$usedHeaders)
	{
		$options = new BitrixMainGridOptions($this->getVariationGridId());
		self::$usedHeaders = $options->getUsedColumns();

		if (!self::$usedHeaders)
		{
			$defaultHeaders = array_filter(
				$this->getGridHeaders(),
				static function ($header)
				{
					return ($header['default'] === true);
				}
			);

			self::$usedHeaders = array_column($defaultHeaders, 'id');
		}
	}

	$usedHeaders = self::$usedHeaders;
	$filteredDescriptions = array_filter(
		$this->getDescriptions(),
		static function ($description) use ($usedHeaders)
		{
			return in_array($description['name'], $usedHeaders, true);
		}
	);

	return parent::getValues($allowDefaultValues, $filteredDescriptions);
}