code: def get_param_group_constructor(model_name: str):
      """
      Lookup the model_name in the model registry and return.
      If the model is not implemented, asserts will be thrown and workflow will exit.
      """
      message = "Unknown parameter group constructor"
      assert model_name in PARAM_GROUP_CONSTRUCTOR_REGISTRY, message
      return PARAM_GROUP_CONSTRUCTOR_REGISTRY[model_name]
  
label_desc: Use image node_id 2 for calling a global function with example usage: get_param_group_constructor(model_name) and returns: PARAM_GROUP_CONSTRUCTOR_REGISTRY