docs: def set_with_conversion(self, variable, value_string):
          """Convert user supplied string to Python type.
  
          Lets user use values such as True, False and integers. All variables can be set
          to None, regardless of type. Handle the case where a string is typed by the user
          and is not quoted, as a string literal.
  
          """
          self._assert_valid_variable(variable)
          try:
              v = ast.literal_eval(value_string)
          except (ValueError, SyntaxError):
              v = value_string
          if v is None or v == "none":
              self._variables[variable] = None
          else:
              try:
                  type_converter = variable_type_map[variable]
                  value_string = self._validate_variable_type(
                      value_string, type_converter
                  )
                  value = type_converter(value_string)
                  self._variables[variable] = value
              except ValueError:
                  raise d1_cli.impl.exceptions.InvalidArguments(
                      "Invalid value for {}: {}".format(variable, value_string)
                  )