code: def to_bytes(self):
      return self.value.encode("utf8")
  
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 1 for calling the SerializableShim obj's underlying member method code with example usage: obj.to_bytes() and returns: self