code: def test_mega_decoder(params):
      vocab_size, labels = prepare()
  
      decoder = MEGADecoder(vocab_size, **params)
      _ = decoder(labels)
  
file_path: espnet/test/espnet2/asr_transducer/test_decoder.py
imports: import pytest
  import torch
  from espnet2.asr_transducer.decoder.mega_decoder import MEGADecoder
  from espnet2.asr_transducer.decoder.rnn_decoder import RNNDecoder
  from espnet2.asr_transducer.decoder.rwkv_decoder import RWKVDecoder
  from espnet2.asr_transducer.decoder.stateless_decoder import StatelessDecoder
label_desc: Use image node_id 5 for calling a global function with example usage: test_mega_decoder(params) without return types