code: public void initialize(ClassLoader classLoader)
      {
          ComponentAnnotationLoader loader = new ComponentAnnotationLoader();
          loader.initialize(this, classLoader);
  
          // Extension point to allow component to manipulate ComponentManager initialized state.
          try {
              List<ComponentManagerInitializer> initializers = this.getInstanceList(ComponentManagerInitializer.class);
              for (ComponentManagerInitializer initializer : initializers) {
                  initializer.initialize(this);
              }
          } catch (ComponentLookupException e) {
              // Should never happen
              this.logger.error("Failed to lookup ComponentManagerInitializer components", e);
          }
      }
docs: Load all component annotations and register them as components.
  
  @param classLoader the class loader to use to look for component definitions