code: def test_can_cast_safely_has_nulls():
      data = cudf.Series([1, 2, 3, None], dtype="float32")._column
      to_dtype = np.dtype("int64")
  
      assert data.can_cast_safely(to_dtype)
  
      data = cudf.Series([1, 2, 3.1, None], dtype="float32")._column
      assert not data.can_cast_safely(to_dtype)
  
imports: import numpy
  import pandas
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_150
  from cudf.testing._utils import NUMERIC_TYPES, assert_eq
  from cudf.utils.dtypes import np_dtypes_to_pandas_dtypes
label_desc: Use image node_id 5 for calling a global function with example usage: test_can_cast_safely_has_nulls() without return types