code: public Optional<AddOnModel> getAddOnForClassLoader(ClassLoader classLoader) {
          return addOns.stream()
                  .filter(addOnModel -> addOnModel.getClass().getClassLoader().equals(classLoader))
                  .findFirst();
      }
docs: Returns the addOn loaded from the given classLoader.
  
  @param classLoader The classLoader.
  @return The (optional) AddOnModel.