code: def assert_packed_frame_unique_pointers(df):
      unpacked = unpack(pack(df))
  
      for col in df:
          if df._data[col].data:
              assert df._data[col].data.get_ptr(
                  mode="read"
              ) != unpacked._data[col].data.get_ptr(mode="read")
  
imports: import pickle
  import sys
  import numpy
  import pandas
  from cudf import DataFrame, GenericIndex, Series
  from cudf._lib.copying import pack, unpack
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 9 for calling a global function with example usage: assert_packed_frame_unique_pointers(df) without return types