code: def collate_func(x):
      return torch.tensor(x)
  
file_path: espnet/test/espnet2/iterators/test_sequence_iter_factory.py
imports: import pytest
  import torch
  from espnet2.iterators.sequence_iter_factory import SequenceIterFactory
label_desc: Use image node_id 1 for calling a global function with example usage: collate_func(x) and returns: torch