code: def test_simple_model_roundtrip_bytes_length():
      """Ensure that serialization of non-initialized weight matrices goes fine"""
      model1 = Maxout(5, 10, nP=2)
      model2 = Maxout(5, 10, nP=2)
  
      data1 = model1.to_bytes()
      model2 = model2.from_bytes(data1)
      data2 = model2.to_bytes()
  
      assert data1 == data2
      assert len(data1) == len(data2)
  
imports: import pytest
  import srsly
  from thinc.api import Linear, Maxout, Model, Shim, chain, deserialize_attr, serialize_attr, with_array
label_desc: Use image node_id 4 for calling a global function with example usage: test_simple_model_roundtrip_bytes_length() without return types