code: def test_nbytes_block(self):
      arr = SparseArray([1, 2, 0, 0, 0], kind="block")
      result = arr.nbytes
      # (2 * 8) + 4 + 4
      # sp_values, blocs, blengths
      assert result == 24
  
imports: import re
  import numpy
  import pytest
  from pandas._libs.sparse import IntIndex
  import pandas
  from pandas import SparseDtype, isna
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 6 for calling the TestSparseArrayAnalytics obj's underlying member method code with example usage: obj.test_nbytes_block() without return types