code: def test_concat_single_object(ignore_index, typ):
      """Ensure that concat on a single object does not change it."""
      obj = typ([1, 2, 3])
      assert_eq(
          gd.concat([obj], ignore_index=ignore_index, axis=0),
          obj,
          check_index_type=True,
      )
  
imports: from decimal import Decimal
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.api.types import is_categorical_dtype
  from cudf.core._compat import PANDAS_GE_150, PANDAS_LT_140
  from cudf.core.dtypes import Decimal32Dtype, Decimal64Dtype, Decimal128Dtype
  from cudf.testing._utils import assert_eq, assert_exceptions_equal
label_desc: Use image node_id 37 for calling a global function with example usage: test_concat_single_object(ignore_index, typ) without return types