public function disk()
    {
        if (is_null($this->disk)) {
            $this->disk = app(Disk::class);
        }

        return $this->disk;
    }
public function disk()
    {
        if (is_null($this->disk)) {
            $this->disk = app(Disk::class);
        }

        return $this->disk;
    }
public function disk ( ) { if ( is_null ( $ this -> disk ) ) { $ this -> disk = app ( Disk :: class ) ; } return $ this -> disk ; }
Return the Disk instance.

@return \Eyewitness\Eye\Monitors\Disk
Return the Disk instance .