protected function getPluginClass($id)
    {
        return isset($this->pluginClasses[$id]) ? $this->pluginClasses[$id] : null;
    }
protected function getPluginClass($id)
    {
        return isset($this->pluginClasses[$id]) ? $this->pluginClasses[$id] : null;
    }
protected function getPluginClass ( $ id ) { return isset ( $ this -> pluginClasses [ $ id ] ) ? $ this -> pluginClasses [ $ id ] : null ; }
Returns the plugin class by plugin ID

@param string $id
@return string
Returns the plugin class by plugin ID