code: def export_repr_block(
      rb: mx.gluon.HybridBlock,
      model_dir: Path,
      model_name: str,
      epoch: int = 0,
  ) -> None:
      """
      Serializes a representable Gluon block.
  
      Parameters
      ----------
      rb
          The block to export.
      model_dir
          The path where the model will be saved.
      model_name
          The name identifying the model.
      epoch
          The epoch number, which together with the `model_name` identifies the
          model parameters.
      """
      with (model_dir / f"{model_name}-network.json").open("w") as fp:
          print(dump_json(rb), file=fp)
      rb.save_parameters(
          str(model_dir / f"{model_name}-{epoch:04}.params")
      )
  
imports: import inspect
  import tempfile
  from pathlib import Path
  from typing import List, Optional, Tuple, cast, Type
  import mxnet
  from mxnet.gluon.block import _flatten
  from gluonts.core.serde import dump_json, load_json
  from gluonts.mx import Tensor
label_desc: Use image node_id 7 for calling a global function with example usage: export_repr_block(rb, model_dir, model_name, epoch) without return types