code: func (c *Comment) GetUrlOk() (string, bool) {
  	if c == nil || c.Url == nil {
  		return "", false
  	}
  	return *c.Url, true
  }
docs: // GetUrlOk returns a tuple with the Url field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.