Author: XE Developers (developers@xpressengine.com)
Inheritance: implements Countabl\Countable, implements Illuminate\Contracts\Support\Arrayable, implements IteratorAggregat\IteratorAggregate, implements Illuminate\Contracts\Support\Jsonable
 /**
  * 주어진 pluginId에 해당하는 플러그인을 조회하여 반환한다. PluginEntity 형태로 반환한다.
  *
  * @param string $pluginId 조회할 plugin의 id
  *
  * @return PluginEntity
  */
 public function getPlugin($pluginId)
 {
     return $this->plugins->get($pluginId);
 }
 /**
  * @depends testConstruct
  */
 public function testCount(PluginCollection $collection)
 {
     $this->assertEquals(2, $collection->count());
 }