code: def assert_validity_equal(
      protocol_buffer, cudf_buffer, size, null, valid
  ):
      if null == _MaskKind.BYTEMASK:
          protocol_mask = _protocol_buffer_to_cudf_buffer(
              protocol_buffer
          )
          assert_eq(
              as_column(protocol_mask, dtype="bool"),
              as_column(cudf_buffer, dtype="bool"),
          )
      elif null == _MaskKind.BITMASK:
          protocol_mask = _protocol_buffer_to_cudf_buffer(
              protocol_buffer
          )
          cudf_mask = cudf_buffer
          assert_eq(
              build_column(
                  as_buffer(cp.zeros(10, dtype="int8")),
                  "int8",
                  size=size,
                  mask=protocol_mask,
                  children=(),
              ),
              build_column(
                  as_buffer(cp.zeros(10, dtype="int8")),
                  "int8",
                  size=size,
                  mask=cudf_mask,
                  children=(),
              ),
          )
      else:
          raise NotImplementedError()
  
imports: from typing import Any, Tuple
  import cupy
  import pandas
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_150
  from cudf.core.buffer import as_buffer
  from cudf.core.column import as_column, build_column
  from cudf.core.df_protocol import DataFrameObject, _CuDFBuffer, _CuDFColumn, _DtypeKind, _MaskKind, _protocol_buffer_to_cudf_buffer, from_dataframe, protocol_dtype_to_cupy_dtype
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 2 for calling a global function with example usage: assert_validity_equal(protocol_buffer, cudf_buffer, size, null, valid) without return types