code: def test_list_struct_list_memory_usage():
      df = cudf.DataFrame({"a": [[{"b": [1]}]]})
      assert df.memory_usage().sum() == 16
  
imports: import functools
  import operator
  import numpy
  import pandas
  import pyarrow
  import pytest
  import cudf
  from cudf import NA
  from cudf._lib.copying import get_element
  from cudf.api.types import is_scalar
  from cudf.testing._utils import DATETIME_TYPES, NUMERIC_TYPES, TIMEDELTA_TYPES, assert_eq
label_desc: Use image node_id 46 for calling a global function with example usage: test_list_struct_list_memory_usage() without return types