code: def choice(value, choices, default=None):
      """
      The equivalent of a "switch statement" for hparams files. The typical use case
      is where different options/modules are available, and a top-level flag decides
      which one to use
  
      Arguments
      ---------
      value: any
          the value to be used as a flag
      choices: dict
          a dictionary maps the possible values of the value parameter
          to the corresponding return values
      default: any
          the default value
  
      Example
      -------
      model: !new:speechbrain.lobes.models.g2p.model.TransformerG2P
          encoder_emb: !apply:speechbrain.utils.hparams.choice
              value: !ref <embedding_type>
              choices:
                  regular: !ref <encoder_emb>
                  normalized: !ref <encoder_emb_norm>
      """
      return choices.get(value, default)
  
label_desc: Use image node_id 1 for calling a global function with example usage: choice(value, choices, default) and returns: choices