code: def __add__(self, other):
      result = super().__add__(other)
      result.info["added"] = result.info.get("added", 0) + 1
      return result
  
imports: import numpy
  from numpy.lib.mixins import NDArrayOperatorsMixin
  from numpy.testing import assert_, assert_raises
  from numpy.ma.testutils import assert_equal
  from numpy.ma.core import array, arange, masked, MaskedArray, masked_array, log, add, hypot, divide, asarray, asanyarray, nomask
label_desc: Use image node_id 3 for calling the SubArray obj's underlying member method code with example usage: obj.__add__(other) and returns: result