EntityCopier::addToResult

private function addToResult(array $result, array $mapIds): array
{
	foreach ($mapIds as $key => $values)
	{
		if (array_key_exists($key, $result))
		{
			$result[$key] += $values;
		}
		else
		{
			$result[$key] = $values;
		}
	}

	return $result;
}