code: def test_merge():
      hp = hp_module.HyperParameters()
      hp.Int("a", 0, 100)
      hp.Fixed("b", 2)
  
      hp2 = hp_module.HyperParameters()
      hp2.Fixed("a", 3)
      hp.Int("c", 10, 100, default=30)
  
      hp.merge(hp2)
  
      assert hp.get("a") == 3
      assert hp.get("b") == 2
      assert hp.get("c") == 30
  
      hp3 = hp_module.HyperParameters()
      hp3.Fixed("a", 5)
      hp3.Choice("d", [1, 2, 3], default=1)
  
      hp.merge(hp3, overwrite=False)
  
      assert hp.get("a") == 3
      assert hp.get("b") == 2
      assert hp.get("c") == 30
      assert hp.get("d") == 1
  
imports: import pytest
  from keras_tuner import protos
  from keras_tuner.backend import keras
  from keras_tuner.engine import hyperparameters
label_desc: Use image node_id 14 for calling a global function with example usage: test_merge() without return types