class_docstr: Class Docstring
  
  - Styling (.style)
  - Plotting (.plot)
  - Callouts (.callout)
  - Axes (.axes)
  - Bokeh figure (.figure)
class_docstr_tok: ["Class","Docstring","-","Styling","(",".style",")","-","Plotting","(",".plot",")","-","Callouts","(",".callout",")","-","Axes","(",".axes",")","-","Bokeh","figure","(",".figure",")"]
docstr: Create the subtitle glyph and add it to the bokeh figure.
docstr_tok: ["Create","the","subtitle","glyph","and","add","it","to","the","bokeh","figure","."]
code: def _add_subtitle_to_figure(self, subtitle_text=None):
      """Create the subtitle glyph and add it to the bokeh figure."""
      if subtitle_text is None:
          if self._blank_labels:
              subtitle_text = ""
          else:
              subtitle_text = """ch.set_subtitle('Data Description')"""
      subtitle_settings = self.style._get_settings("subtitle")
      _subtitle_glyph = bokeh.models.Title(
          text=subtitle_text,
          align=subtitle_settings["subtitle_align"],
          text_color=subtitle_settings["subtitle_text_color"],
          text_font_size=subtitle_settings["subtitle_text_size"],
          text_font=subtitle_settings["subtitle_text_font"],
      )
      self.figure.add_layout(
          _subtitle_glyph, subtitle_settings["subtitle_location"]
      )
      return _subtitle_glyph
  
imports: from collections import OrderedDict
  from functools import wraps
  import io
  from io import BytesIO
  import tempfile
  import warnings
  import bokeh
  from bokeh.io.export import _SVG_SCRIPT, wait_until_render_complete
  import bokeh.plotting
  from bokeh.embed import file_html
  from bokeh.resources import INLINE
  from IPython.display import display
  from PIL import Image
  from PIL.Image import Resampling
  from selenium import webdriver
  from selenium.webdriver.chrome.options import Options
  from chartify._core.style import Style
  from chartify._core.axes import BaseAxes, SecondYNumericalAxis, SecondAxis
  from chartify._core.plot import BasePlot
  from chartify._core.callout import Callout
  from chartify._core.options import options
label_desc: Use image node_id 4 for calling the Chart obj's underlying member method code with example usage: obj._add_subtitle_to_figure(subtitle_text) and returns: _subtitle_glyph