code: def __get_threshold_elements(
      fairness_threshold,
      ref_group,
      scales,
      chart_height,
      chart_width,
      accessibility_mode=False,
      warnings=(),
  ):
      """Gets threshold elements (rules, bands and text) for the chart."""
  
      # CREATE THRESHOLD DF
      threshold_df = pd.DataFrame(
          {
              "min": -fairness_threshold + 1,
              "max": fairness_threshold - 1,
              "lower_end": scales["x"]["domain"][0],
              "upper_end": scales["x"]["domain"][1],
          },
          index=[0],
      )
  
      # RULES
      threshold_rules = __draw_threshold_rules(
          threshold_df, scales, chart_height, accessibility_mode
      )
  
      # BANDS
      threshold_bands = __draw_threshold_bands(
          threshold_df,
          scales,
          chart_height,
          chart_width,
          accessibility_mode,
      )
  
      # HELPER TEXT
      threshold_text = __draw_threshold_text(
          fairness_threshold,
          ref_group,
          chart_height,
          accessibility_mode,
          warnings,
      )
  
      return threshold_rules + threshold_bands + threshold_text
  
imports: import math
  import altair
  import pandas
  from aequitas.plot.commons.helpers import no_axis, transform_ratio, get_chart_metadata
  from aequitas.plot.commons.legend import draw_legend
  from aequitas.plot.commons.scales import get_chart_size_range
  from aequitas.plot.commons.tooltips import get_tooltip_text_group_size, get_tooltip_text_disparity_explanation
  from aequitas.plot.commons.style.classes import Metric_Axis, Axis, Annotation, Reference_Rule, Threshold_Rule, Threshold_Band, Bubble, Chart_Title
  from aequitas.plot.commons.style.text import FONT, FONT_SIZE_SMALL
  from aequitas.plot.commons.style.sizes import Disparity_Chart
  from aequitas.plot.commons import initializers
  from aequitas.plot.commons import labels
label_desc: Use image node_id 10 for calling a global function with example usage: __get_threshold_elements(fairness_threshold, ref_group, scales, chart_height, chart_width, accessibility_mode, warnings) and returns: unknown