code: def test_construct_empty_theme_from_json(self) -> None:
      # create and apply empty theme with no exception thrown
      theme = Theme(json=dict())
      theme.apply_to_model(ThemedModel())
  
imports: from __future__ import annotations
  import pytest
  import os
  import tempfile
  from bokeh.core.properties import Int, String
  from bokeh.core.property_mixins import FillProps, LineProps, TextProps
  from bokeh.document import Document
  from bokeh.model import Model
  from bokeh.plotting import figure
  from bokeh.util.deprecation import BokehDeprecationWarning
  from bokeh.themes import Theme, built_in_themes, DARK_MINIMAL, LIGHT_MINIMAL
label_desc: Use image node_id 2 for calling the TestThemes obj's underlying member method code with example usage: obj.test_construct_empty_theme_from_json() without return types