feat(renderer): add generic method to retrieve renderingBo by ID and type

src/main/java/de/extio/game_engine/renderer/container/Window.java

@@ -304,6 +304,10 @@ public class Window extends AbstractClientModule implements InitializingBean {
 		return this.rendererWorkingSet.getUncommittedWork(this.id);
 	}
 
+	public <T extends RenderingBo> T getRenderingBo(final String renderingBoId, final Class<T> type) {
+		return this.rendererWorkingSet.get(this.id, renderingBoId, type);
+	}
+	
 	public void putRenderingBo(final RenderingBo renderingBo) {
 		this.rendererWorkingSet.put(this.id, renderingBo);
 	}