public function screenshot($themeName)
    {
        $theme = plugin($themeName); // throws
        $this->response->file("{$theme->path}/webroot/screenshot.png");

        return $this->response;
    }
public function screenshot($themeName)
    {
        $theme = plugin($themeName); // throws
        $this->response->file("{$theme->path}/webroot/screenshot.png");

        return $this->response;
    }
public function screenshot ( $ themeName ) { $ theme = plugin ( $ themeName ) ; // throws $ this -> response -> file ( "{$theme->path}/webroot/screenshot.png" ) ; return $ this -> response ; }
Renders theme's "screenshot.png"

@param string $themeName Theme's name
@return \Cake\Network\Response
Renders theme s screenshot . png