code: def __hash__(self):
      return hash(
          (self.raw_dist, self.raw_params, self.expected_value_domain)
      )
  
imports: import re
  from collections import OrderedDict, namedtuple
  from importlib import import_module
  import numpy
  import pytest
  import funsor
  import funsor.ops
  from funsor.distribution import BACKEND_TO_DISTRIBUTIONS_BACKEND
  from funsor.interpretations import CallableInterpretation, eager, lazy, normalize, reflect
  from funsor.terms import to_data, to_funsor
  from funsor.testing import assert_close, check_funsor, excludes_backend, rand, randint, randn, random_scale_tril, xfail_if_not_found, xfail_if_not_implemented, xfail_param
  from funsor.util import get_backend
label_desc: Use image node_id 4 for calling the DistTestCase obj's underlying member method code with example usage: obj.__hash__() and returns: hash