code: def get_index2latex(model_description):
      
      index2latex = {}
      translation_csv = os.path.join(get_project_root(),
                                     model_description["data-source"],
                                     "index2formula_id.csv")
      with open(translation_csv) as csvfile:
          csvreader = csv.DictReader(csvfile, delimiter=',', quotechar='"')
          for row in csvreader:
              index2latex[int(row['index'])] = row['latex']
      return index2latex
docs: Get a dictionary that maps indices to LaTeX commands.
  
      Parameters
      ----------
      model_description : string
          A model description file that points to a feature folder where an
          `index2formula_id.csv` has to be.
  
      Returns
      -------
      dictionary :
          Maps indices to LaTeX commands