Cml\Container::singleton PHP Метод

绑定单例服务

public singleton ( string \| array $abstract, Closure \| string \| null $concrete = null )
$abstract	string \| array	服务的名称
$concrete	Closure \| string \| null

    public function singleton($abstract, $concrete = null)
    {
        return $this->bind($abstract, $concrete, true);
    }

Container