code: def __iadd__(self, other):
      result = super().__iadd__(other)
      result.info["iadded"] = result.info.get("iadded", 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 4 for calling the SubArray obj's underlying member method code with example usage: obj.__iadd__(other) and returns: result