code: def _constructor(self):
      return MySubclassWithMetadata
  
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series
  import pandas._testing
label_desc: Use image node_id 2 for calling the MySubclassWithMetadata obj's underlying member method code with example usage: obj._constructor() and returns: MySubclassWithMetadata