code: def age_ratios():
          
          # FIXME(IS) set a correct parameter container
          parameter_container = None
  
          youth_ratio = parameter_container.get_parameter_by_guid(
              youth_ratio_field['key']).value
          adult_ratio = parameter_container.get_parameter_by_guid(
              adult_ratio_field['key']).value
          elderly_ratio = parameter_container.get_parameter_by_guid(
              elderly_ratio_field['key']).value
          ratios = [youth_ratio, adult_ratio, elderly_ratio]
  
          return ratios
docs: Helper to get list of age ratio from the options dialog.
  
          :returns: List of age ratio.
          :rtype: list