code: def test_decimal_friendly_collate_empty_input():
      assert decimal_friendly_collate([dict()]) == dict()
  
imports: from decimal import Decimal
  from packaging import version
  import numpy
  import pyarrow
  import pytest
  import torch
  from petastorm import make_reader, TransformSpec, make_batch_reader
  from petastorm.pytorch import _sanitize_pytorch_types, DataLoader, BatchedDataLoader, decimal_friendly_collate, InMemBatchedDataLoader, _load_rows_into_mem
  from petastorm.tests.test_common import TestSchema
label_desc: Use image node_id 6 for calling a global function with example usage: test_decimal_friendly_collate_empty_input() without return types