code: def test_ints(self):
      hasher = hashing.Hasher(salt="")
      res = hasher.hash_key(0)
      self.assertEqual(res, 276215275525073243129443018166533317850)
      res = hasher.hash_key(123455678901234567890)
      self.assertEqual(res, 6876359009333865997613257802033240610)
  
imports: from tensorflow_datasets import testing
  from tensorflow_datasets.core import hashing
label_desc: Use image node_id 1 for calling the HashingTest obj's underlying member method code with example usage: obj.test_ints() without return types