How To Make A Jsoup Whitelist To Accept Certain Attribute Content

I'm using Jsoup with relaxed whitelist. It seems perfect but I would like to keep the embedded images tags like

publicclassRelaxedPlusDataBase64ImagesextendsWhitelist {
    publicRelaxedPlusDataBase64Images() {
        //copied from Whitelist.relaxed()
        addTags("a", "b", "blockquote", "br", "caption", "cite", "code", "col",
                "colgroup", "dd", "div", "dl", "dt", "em", "h1", "h2", "h3", "h4", "h5", "h6",
                "i", "img", "li", "ol", "p", "pre", "q", "small", "strike", "strong",
                "sub", "sup", "table", "tbody", "td", "tfoot", "th", "thead", "tr", "u",
                "ul");
        addAttributes("a", "href", "title");
        addAttributes("blockquote", "cite");
        addAttributes("col", "span", "width");
        addAttributes("colgroup", "span", "width");
        addAttributes("img", "align", "alt", "height", "src", "title", "width");
        addAttributes("ol", "start", "type");
        addAttributes("q", "cite");
        addAttributes("table", "summary", "width");
        addAttributes("td", "abbr", "axis", "colspan", "rowspan", "width");
        addAttributes("th", "abbr", "axis", "colspan", "rowspan", "scope", "width");
        addAttributes("ul", "type");
        addProtocols("a", "href", "ftp", "http", "https", "mailto");
        addProtocols("blockquote", "cite", "http", "https");
        addProtocols("cite", "cite", "http", "https");
        addProtocols("img", "src", "http", "https");
        addProtocols("q", "cite", "http", "https");
    }

    @OverrideprotectedbooleanisSafeAttribute(String tagName, Element el, Attribute attr) {
        return ("img".equals(tagName)
                && "src".equals(attr.getKey())
                && attr.getValue().startsWith("data:;base64")) ||
            super.isSafeAttribute(tagName, el, attr);
    }
}

As you haven't provided the code you're using to parse or the HTML you're sanitizing, I haven't tested this.