docs: def __insert_frond_RF(d_w, d_u, dfs_data):
      """Encapsulates the process of inserting a frond uw into the right side frond group."""
      # --Add the frond to the right side
      dfs_data['RF'].append( (d_w, d_u) )
      dfs_data['FG']['r'] += 1
  
      dfs_data['last_inserted_side'] = 'RF'