src/ImageSize.php
public static function get($name)
    {
        $name = (strtolower($name) === self::SIZE_ORIG) ? self::SIZE_ORIG : strtoupper($name);

        return isset(self::$allowedSize[$name]) ? self::$allowedSize[$name] : null;
    }
public static function get($name)
    {
        $name = (strtolower($name) === self::SIZE_ORIG) ? self::SIZE_ORIG : strtoupper($name);

        return isset(self::$allowedSize[$name]) ? self::$allowedSize[$name] : null;
    }
get name allowed return

@param  string      $name
@return string|null