code: def test_timeseries_deserialize_to_timeseries():
      serialized_block = blocks.serialize(blocks.TimeseriesBlock())
  
      block = blocks.deserialize(serialized_block)
  
      assert isinstance(block, blocks.TimeseriesBlock)
  
imports: import keras_tuner
  import tensorflow
  from tensorflow import keras
  from tensorflow import nest
  from autokeras import analysers
  from autokeras import blocks
  from autokeras import test_utils
label_desc: Use image node_id 18 for calling a global function with example usage: test_timeseries_deserialize_to_timeseries() without return types