Document::getActivityByAssociatedEntity

static function getActivityByAssociatedEntity(int $associatedEntityId): ?array
{
	$activity = \CCrmActivity::GetList(
		[],
		[
			'TYPE_ID' => \CCrmActivityType::Provider,
			'PROVIDER_ID' => self::getId(),
			'PROVIDER_TYPE_ID' => self::PROVIDER_TYPE_ID_DOCUMENT,
			'ASSOCIATED_ENTITY_ID' => $associatedEntityId,
		],
		false,
		false,
	)->Fetch();

	return is_array($activity) ? $activity : null;
}