用 colly 迭代 HTMLElement 属性？

如HTML结构中所示，属性是私有属性：

// HTMLElement is the representation of a HTML tag.
type HTMLElement struct {
    // Name is the name of the tag
    Name       string
    Text       string
    attributes []html.Attribute
    // Request is the request object of the element's HTML document
    Request *Request
    // Response is the Response object of the element's HTML document
    Response *Response
    // DOM is the goquery parsed DOM object of the page. DOM is relative
    // to the current HTMLElement
    DOM *goquery.Selection
    // Index stores the position of the current element within all the elements matched by an OnHTML callback
    Index int
}

有.Attr()用于获取单个属性的函数，但我将如何迭代所有属性？似乎没有明显的方法可以attributes从该结构访问或使用函数。