code: def testHashStringsWithKeyDenseInput(self):
      with tf.compat.v1.Graph().as_default():
          strings = tf.constant(["Cake", "Pie", "Sundae"])
          expected_output = [6, 5, 6]
          hash_buckets = 11
          hashed_strings = mappers.hash_strings(
              strings, hash_buckets, key=[123, 456]
          )
          with self.test_session() as sess:
              output = sess.run(hashed_strings)
              self.assertAllEqual(expected_output, output)
  
imports: import numpy
  import tensorflow
  from tensorflow_transform import mappers
  from tensorflow_transform import test_case
label_desc: Use image node_id 29 for calling the MappersTest obj's underlying member method code with example usage: obj.testHashStringsWithKeyDenseInput() without return types