code: def update_metadata_from(self, datapoint: Tuple[str, bool]) -> None:
      self.__str_node_annotation.update_metadata_from(datapoint[0])
  
imports: import torch
  from torch import nn
  from typing import Any, Dict, Tuple
  from ptgnn.baseneuralmodel import AbstractNeuralModel
  from ptgnn.neuralmodels.embeddings.strelementrepresentationmodel import StrElementRepresentationModel
  from ptgnn.neuralmodels.gnn.structs import AbstractNodeEmbedder
label_desc: Use image node_id 2 for calling the CandidateNodeAnnotationModel obj's underlying member method code with example usage: obj.update_metadata_from(datapoint) without return types