code: def get_app_kwarg_dict(appInstance=None):
      
      app = (appInstance or current_app)
  
      # In order to support blueprints which do not have a config attribute
      app_config = getattr(app, 'config', {})
  
      return {
          k.lower().replace('cors_', ''): app_config.get(k)
          for k in CONFIG_OPTIONS
          if app_config.get(k) is not None
      }
docs: Returns the dictionary of CORS specific app configurations.