How to use the textfsm.parser.TextFSMValue function in textfsm

for line in template:
      self._line_num += 1
      line = line.rstrip()

      # Blank line signifies end of Value definitions.
      if not line:
        return
      if not isinstance(line, six.string_types):
        line = line.decode('utf-8')
      # Skip commented lines.
      if self.comment_regex.match(line):
        continue

      if line.startswith('Value '):
        try:
          value = TextFSMValue(
              fsm=self, max_name_len=self.MAX_NAME_LEN,
              options_class=self._options_cls)
          value.Parse(line)
        except TextFSMTemplateError as error:
          raise TextFSMTemplateError('%s Line %s.' % (error, self._line_num))

        if value.name in self.header:
          raise TextFSMTemplateError(
              "Duplicate declarations for Value '%s'. Line: %s."
              % (value.name, self._line_num))

        try:
          self._ValidateOptions(value)
        except TextFSMTemplateError as error:
          raise TextFSMTemplateError('%s Line %s.' % (error, self._line_num))