code: public void initialize(ComponentManager manager, ClassLoader classLoader)
      {
          try {
              // Find all declared components by retrieving the list defined in COMPONENT_LIST.
              List<ComponentDeclaration> componentDeclarations = getDeclaredComponents(classLoader, COMPONENT_LIST);
  
              // Find all the Component overrides and adds them to the bottom of the list as component declarations with
              // the highest priority of 0. This is purely for backward compatibility since the override files is now
              // deprecated.
              List<ComponentDeclaration> componentOverrideDeclarations =
                  getDeclaredComponents(classLoader, COMPONENT_OVERRIDE_LIST);
              for (ComponentDeclaration componentOverrideDeclaration : componentOverrideDeclarations) {
                  // Since the old way to declare an override was to define it in both a component.txt and a
                  // component-overrides.txt file we first need to remove the override component declaration stored in
                  // componentDeclarations.
                  componentDeclarations.remove(componentOverrideDeclaration);
                  // Add it to the end of the list with the highest priority.
                  componentDeclarations.add(new ComponentDeclaration(componentOverrideDeclaration
                      .getImplementationClassName(), 0));
              }
  
              initialize(manager, classLoader, componentDeclarations);
          } catch (Exception e) {
              // Make sure we make the calling code fail in order to fail fast and prevent the application to start
              // if something is amiss.
              throw new RuntimeException("Failed to get the list of components to load", e);
          }
      }
docs: Loads all components defined using annotations.
  
  @param manager the component manager to use to dynamically register components
  @param classLoader the classloader to use to look for the Component list declaration file (
  {@code META-INF/components.txt})