protected void replaceAllChildren(List<T> values, SafeHtml html) {
        replaceAllChildren(this, getChildContainer(), html);
    }
Replace all children with the specified html.

@param values the values of the new children
@param html the html to render, or null if
         {@link #renderRowValues(SafeHtmlBuilder, List, int, SelectionModel)}
         throws an {@link UnsupportedOperationException}
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/AbstractHasData.java