// src='evil.js'></script><pre '", we only use safe values for CSS
// classes. There's no need for the class names to be human readable.
int streamId = streamFilters.countEntries();
String itemClass = "w-s-" + streamId;
String containerClass = STREAM_FILTER_PREFIX + streamId;
filter = new FilterButton(new DoubleClickHandler() {
@Override
public void onDoubleClick(DoubleClickEvent event) {
enableOnlyOneStream(stream);
}
}, entries, containerClass, itemClass, stream, css.stream());