src/S3/BucketEndpointArnMiddleware.php [320:338]:
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                if ($arn->getPartition() !== $clientPart->getName()) {
                    throw new InvalidRegionException('The supplied ARN partition'
                        . " does not match the client's partition.");
                }
                if ($clientPart->getName() !== $arnPart->getName()) {
                    throw new InvalidRegionException('The corresponding partition'
                        . ' for the supplied ARN region does not match the'
                        . " client's partition.");
                }

                // Ensure ARN region matches client region unless
                // configured for using ARN region over client region
                $this->validateMatchingRegion($arn);

                // Ensure it is not resolved to fips pseudo-region for S3 Outposts
                $this->validateFipsConfigurations($arn);
            }

            return $arnPart;
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src/S3Control/EndpointArnMiddleware.php [342:359]:
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        if ($arn->getPartition() !== $clientPart->getName()) {
            throw new InvalidRegionException('The supplied ARN partition'
                . " does not match the client's partition.");
        }
        if ($clientPart->getName() !== $arnPart->getName()) {
            throw new InvalidRegionException('The corresponding partition'
                . ' for the supplied ARN region does not match the'
                . " client's partition.");
        }

        // Ensure ARN region matches client region unless
        // configured for using ARN region over client region
        $this->validateMatchingRegion($arn);

        // Ensure it is not resolved to fips pseudo-region for S3 Outposts
        $this->validateFipsConfigurations($arn);

        return $arnPart;
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