ManaPHP\Alias::set PHP Method

    public function set($name, $path)
    {
        if ($name[0] !== '@') {
            throw new AliasException('`:name` must start with `@`', ['name' => $name]);
        }
        if (strpos($name, '@ns.') === 0) {
            $this->_aliases[$name] = $path[0] === '@' ? $this->resolve($path) : $path;
        } else {
            $this->_aliases[$name] = $this->resolve($path);
        }
        return $this->_aliases[$name];
    }