code: public <T extends SimonConsolePlugin> List<T> getPluginsByType(Class<T> pluginType) {
  		List<T> specPlugins = new ArrayList<>();
  		for (SimonConsolePlugin plugin : plugins) {
  			if (pluginType.isInstance(plugin)) {
  				specPlugins.add(pluginType.cast(plugin));
  			}
  		}
  		return Collections.unmodifiableList(specPlugins);
  	}
docs: Return plugin list, filtered by plugin type.