public function getWidgetUrlFor($region, $environment, $merchantId, $overrideUrl)
	{
		return sprintf(self::WIDGET_FORMAT_STRING, 
					$this->_getWidgetHostFor($region, $overrideUrl), 
					$this->_getWidgetRegionFor($region), 
			    	$this->_getWidgetEnvironmentFor($environment),
					urlencode($merchantId));
	}