code: def __getitem__(self, aslice):
      return MockDataFrame(self.array[aslice])
  
imports: import numpy
  from ..base import BaseEstimator, ClassifierMixin
  from .testing import assert_true
  from .validation import _num_samples, check_array
label_desc: Use image node_id 2 for calling the ArraySlicingWrapper obj's underlying member method code with example usage: obj.__getitem__(aslice) and returns: MockDataFrame