How to avoid "CSS attribute context" warning with GWT 2.5's UiRenderer?

I'm trying to port a GWT 2.4 AbstractCell that uses SafeHtmlTemplates to a GWT 2.5 AbstractCell that uses UiRenderer.  My problem is that when I set the CSS style directly on a div element, GWT logs the "CSS attribute context" warning in my logs.  Using a String, the Cell works fine albeit with the warning, but my attempts to pass a SafeStyles have failed.

In my GWT 2.4 AbstractCell I had a template that used SafeStyles:

@SafeHtmlTemplates.Template("<div style=\"{0}\">{1}</div>")

      SafeHtml cell(SafeStyles styles, SafeHtml value);

When I try passing a SafeStyles, I get the following error:

17:18:33.582 [ERROR] [my.widgets] java.lang.String required, but {styles} returns com.google.gwt.safecss.shared.SafeStyles: &lt;div  style='{styles}'&gt; (:28)

When I use a String, everything works correctly, however I get the expected "CSS attribute context" warning.

17:16:51.108 [WARN] [my.widgets] Template with variable in CSS attribute context: The template code generator cannot guarantee HTML-safety of the template -- please inspect manually or use SafeStyles to specify arguments in a CSS attribute context

Incidentally, I had a similar issue passing an image URL.  The logs warned me to use SafeUri, which I did and it worked, so it appears that img recognizes a SafeUri but div won't recognize a SafeStyles.

        <div style="{styles}">

            <img alt="{name}" src="{image}" />

        </div>

Enrique

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