/**
* @param string $dimensions in the format WxHxL ex: 2x3x4
* @return Box
*/
public function createBox($dimensions)
{
list($width, $height, $length) = explode('x', $dimensions);
$box = new Box();
$box->setWidth($width);
$box->setHeight($height);
$box->setLength($length);
return $box;
}