docstr: Test e._total_size 
docstr_tok: ["Test","e._total_size"]
code: def test__total_size(self):
      """Test e._total_size"""
      e = _ArrayMemoryError((1,), np.dtype(np.uint8))
      assert e._total_size == 1
  
      e = _ArrayMemoryError((2, 4), np.dtype((np.uint64, 16)))
      assert e._total_size == 1024
  
file_path: catboost/contrib/python/numpy/py3/numpy/core/tests/test__exceptions.py
imports: import pickle
  import pytest
  import numpy
label_desc: Use image node_id 4 for calling the TestArrayMemoryError obj's underlying member method code with example usage: obj.test__total_size() without return types