lib/AmazonSNS.php
public function setRegion($region) {
		if(!isset($this->endpoints[$region])) {
			throw new InvalidArgumentException('Region unrecognised');
		}

		return $this->endpoint = $this->protocol . $this->endpoints[$region];
	}
public function setRegion($region) {
		if(!isset($this->endpoints[$region])) {
			throw new InvalidArgumentException('Region unrecognised');
		}

		return $this->endpoint = $this->protocol . $this->endpoints[$region];
	}
Set the SNS endpoint/region

@link http://docs.amazonwebservices.com/general/latest/gr/index.html?rande.html
@param string $region
@return string
@throws InvalidArgumentException