code: def testHash(self):
      a = t2a(tf.convert_to_tensor(value=10))
      self.assertNotIsInstance(a, abc.Hashable)
      with self.assertRaisesWithPredicateMatch(
          TypeError, r"unhashable type"
      ):
          hash(a)
  
imports: from collections import abc
  import numpy
  import tensorflow.compat.v2
  from trax.tf_numpy.numpy_impl import arrays
  from trax.tf_numpy.numpy_impl import math_ops
label_desc: Use image node_id 25 for calling the ArrayTest obj's underlying member method code with example usage: obj.testHash() without return types