code: def test_init(self) -> None:
      with pytest.raises(TypeError):
          bcpe.Either()
  
file_path: bokeh/tests/unit/bokeh/core/property/test_either.py
imports: from __future__ import annotations
  import pytest
  from bokeh.core.properties import Dict, Int, Interval, List, Regex, String
  from bokeh.core.property.wrappers import PropertyValueDict, PropertyValueList
  from tests.support.util.api import verify_all
  from _util_property import _TestHasProps, _TestModel
  import bokeh.core.property.either
label_desc: Use image node_id 1 for calling the Test_Either obj's underlying member method code with example usage: obj.test_init() without return types