code: public static UserGroupCallbackBuilder builder(ClassLoader classLoader, KnowledgeComponentImplementationModel implementationModel) {
          UserGroupCallbackModel userGroupCallbackModel = implementationModel != null ? implementationModel.getUserGroupCallback() : null;
          return new UserGroupCallbackBuilder(classLoader, userGroupCallbackModel);
      }
docs: Creates a UserGroupCallbackBuilder.
  
  @param classLoader classLoader
  @param implementationModel implementationModel
  @return a UserGroupCallbackBuilder