code: def draw_chart_title(chart_title, chart_width):
      """Draws chart titles."""
  
      title = (
          alt.Chart(DUMMY_DF)
          .mark_text(
              align="center",
              fill=Title.font_color,
              fontSize=Title.font_size,
              fontWeight=Title.font_weight,
              font=FONT,
              tooltip=None,
          )
          .encode(
              x=alt.value(chart_width / 2),
              y=alt.value(Title.margin_top),
              text=alt.value(chart_title),
          )
      )
  
      return title
  
file_path: aequitas/src/aequitas/plot/bubble_concatenation_chart.py
imports: import altair
  import pandas
  from aequitas.plot.bubble_disparity_chart import get_disparity_bubble_chart_components
  from aequitas.plot.bubble_metric_chart import get_metric_bubble_chart_components
  from aequitas.plot.commons.helpers import get_chart_metadata
  from aequitas.plot.commons.legend import draw_legend
  from aequitas.plot.commons.style.classes import Title, Metric_Axis, Chart_Title
  from aequitas.plot.commons.style.text import FONT, FONT_SIZE_SMALL
  from aequitas.plot.commons.style.sizes import Concat_Chart
  from aequitas.plot.commons import initializers
label_desc: Use image node_id 2 for calling a global function with example usage: draw_chart_title(chart_title, chart_width) and returns: title