Wrapping elements doesn't wrap them, no exception shown

I want to wrap each Element of my JSouped document. These Elements are defined according to the presence of the word color in the value of the property style.

The document is: <body><span style="color: rgb(37, 163, 73);">Test</span></body>.

So I have written:

Document jsoup_document_caption = Jsoup.parse("<body><span style=\"color: rgb(37, 163, 73);\">Test</span></body>");
Elements elements = jsoup_document_caption.getElementsByAttributeValueContaining("style", "color");
Elements jsouped_elements = elements.wrap("<div></div>");
String jsouped_caption = jsouped_elements.outerHtml();

Each of the three last lines, when printed, shows: <span style="color: rgb(37, 163, 73);">Test</span>.

Considering in particular System.out.println(jsouped_caption), we can see it hasn't been wrapped. Do you know why? I have carefully read the doc but didn't find any answer: https://jsoup.org/apidocs/org/jsoup/select/Elements.html + https://jsoup.org/cookbook/.

Edit:

It's the same if I treat Element by Element:

    Elements elements = jsoup_document_caption.getElementsByAttributeValueContaining("style", "color");
    for(Element element : elements) {
        System.out.println("Found element:");
        System.out.println(element);
        Element jsouped_element = element.wrap("<div></div>");
        System.out.println("JSouped:");
        String jsouped_caption = jsouped_element.outerHtml();
        System.out.println(jsouped_caption);
    }

Solution

After you wrap an element, the wrap is outside the element itself - it becomes it's parent, so you can do this:

Document jsoup_document_caption = Jsoup.parse("<body><span style=\"color: rgb(37, 163, 73);\">Test</span></body>");
Elements elements = jsoup_document_caption.getElementsByAttributeValueContaining("style", "color");
System.out.println(elements); //outputs your original selection -<span style="color: rgb(37, 163, 73);">Test</span>
elements.wrap("<div/></div>");
System.out.println(elements); //still the same output - elements is unchanged
Element wrapped = elements.parents().first(); //now you have the original element AND the wrap
System.out.println(wrapped);

The output of the last print is <div> <span style="color: rgb(37, 163, 73);">Test</span> </div>