code: def test_to_bytes():
      returned = compat.to_bytes(Clazz())
      _assert_strings_equal(BYTES_STRING, returned)
  
file_path: sumy/tests/test_utils/test_unicode_compatible_class.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import pytest
  from sumy import _compat
label_desc: Use image node_id 3 for calling a global function with example usage: test_to_bytes() without return types