code: def output_size(self) -> Union[Dict[str, int], int]:
      return {
          name: sizes[1] for name, sizes in self.embedding_sizes.items()
      }
  
imports: from typing import Dict, List, Optional, Tuple, Union
  import torch
  import torch.nn
  import torch.nn.functional
  from darts.logging import get_logger
  from darts.utils.torch import MonteCarloDropout
label_desc: Use image node_id 3 for calling the _MultiEmbedding obj's underlying member method code with example usage: obj.output_size() and returns: unknown