code: def _get_const_info(const_index, const_list):
      
      argval = const_index
      if const_list is not None:
          try:
              argval = const_list[const_index]
          except IndexError:
              raise ValidationError("Consts value out of range: {}".format(const_index)) from None
      return argval, repr(argval)
docs: Helper to get optional details about const references
  
         Returns the dereferenced constant and its repr if the constant
         list is defined.
         Otherwise returns the constant index and its repr().