code: def get_chart_metadata(filename):
      """Generate the metadata for a single Altair chart."""
      return {
          # Vega-Embed (https://github.com/vega/vega-embed) options:
          "embedOptions": {
              # The multiplier for the width and height
              # to export a higher resolution image.
              "scaleFactor": 5,
              # The filename (without extension) for the
              # chart when exported in PNG or SVG format.
              "downloadFileName": filename,
          }
      }
  
file_path: aequitas/src/aequitas/plot/commons/helpers.py
imports: import altair
  import numpy
  from millify import millify, prettify
label_desc: Use image node_id 6 for calling a global function with example usage: get_chart_metadata(filename) and returns: dict