class_docstr: Contains attributes and methods for modifying the aesthetic
  style of the chart.
code: def _font_value(text_font):
      # https://github.com/bokeh/bokeh/issues/11044
      if version.parse(bokeh.__version__) < version.parse("2.3"):
          return text_font
      else:  # >= 2.3
          return bokeh_value(text_font)
  
imports: from itertools import cycle
  import yaml
  import bokeh
  from bokeh.core.properties import value
  from chartify._core import colors
  from chartify._core.options import options
  from packaging import version
label_desc: Use image node_id 2 for calling the Style obj's underlying member method code with example usage: obj._font_value(text_font) and returns: text_font, bokeh_value